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anonymous

  • 5 years ago

the veranda is covered with tiles(30cm times 30cm) in 5 black and4 white tiles,how many black tiles are used to cover the veranda floor if that pattern is continued

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  1. anonymous
    • 5 years ago
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    what is the total area of the veranda?

  2. anonymous
    • 5 years ago
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    the area is 4,2m time 1m=4,2m

  3. anonymous
    • 5 years ago
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    total area = \[4.2\operatorname{m}^2\]?

  4. anonymous
    • 5 years ago
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    the total area is 4.2 \[m ^{2}\]

  5. anonymous
    • 5 years ago
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    do you have an answer? I get 25 but I am rounding down as the answer I got is not an integer...

  6. anonymous
    • 5 years ago
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    so the answer is 25 black tiles

  7. amistre64
    • 5 years ago
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    Veranda is covered with tiles (30cm times 30cm): is 30 by 30 the measurement of each tile?

  8. anonymous
    • 5 years ago
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    yes in cm

  9. amistre64
    • 5 years ago
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    good, a centimeter is 1/100 of a meter. You said that the enire veranda is 4.2 meters squared right?

  10. anonymous
    • 5 years ago
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    yes.

  11. amistre64
    • 5 years ago
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    .03 (.03) = .0009 m^2 right?

  12. anonymous
    • 5 years ago
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    yes because you converted the cm to m

  13. amistre64
    • 5 years ago
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    thats my error... it should be .3(.3) = .09 m^2

  14. amistre64
    • 5 years ago
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    yes, we need to convert centimeters to meters to be able to determine how many m^2 one tile covers

  15. anonymous
    • 5 years ago
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    you right it is 0.3 because 30/100 =0.3m

  16. amistre64
    • 5 years ago
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    .09x=4.2? x = 4.2/.09 = 420/9 which is 46 and 2/3 tiles all together

  17. amistre64
    • 5 years ago
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    I know that 7 times 6 is equal to 42; so I assume that this veranda is NOT a square. and that it is either .6 meters by 7meters, or .7meters by 6 meters. Would that be a fair assumption to you?

  18. anonymous
    • 5 years ago
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    the veranda lenght is 4,2m by breadth 1m

  19. amistre64
    • 5 years ago
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    4.2 by 1 meter? thats good too :) either way we need 46/23 tiles all together.

  20. anonymous
    • 5 years ago
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    @amistre, is area under any curve found out by integrating the function?

  21. amistre64
    • 5 years ago
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    @think; yes. When we integrate a function, we are adding up all the little slices that it is made of. Which would equal its area.

  22. amistre64
    • 5 years ago
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    I get 3 and 1/3 tile in 1 meter.

  23. anonymous
    • 5 years ago
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    okay, so integrating=finding the area & differentiating= ?

  24. amistre64
    • 5 years ago
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    differentiating is ....finding the rate of change with respect to another variable. Differentiate with respect to (x) or (time). And thats finding the derivative.

  25. amistre64
    • 5 years ago
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    and I get 14 tiles to fit in 4.2 meters

  26. amistre64
    • 5 years ago
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    14(.3) = 4.2 right?

  27. anonymous
    • 5 years ago
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    30cm * 30cm=900cm 900cm divide by 100m =9m*4,2m= 40 tiles

  28. amistre64
    • 5 years ago
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    cant do it like that; you have to realize that the area changes and you no longer deal with 900 cm.. each tile is .3 meters wide; (.3)(.3) = .09 m^2 you have to use this measure of area. otherwise you mess yourself up. Does that make sense?

  29. amistre64
    • 5 years ago
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    900cm^2 is not easily converted to m^2 so convert it before you find the area.

  30. anonymous
    • 5 years ago
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    oh okay so the answer u gave me the 1st one is right

  31. amistre64
    • 5 years ago
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    Yes. .3 meters wide by .3 meters deep. .3x = 4.2 x = 14 tiles along the 4.2 meter side. .3x = 1 x = 1/.3 = 10/3 x = 3 and 1/3 tile to span 1 meter side. Do you agree with those numbers?

  32. anonymous
    • 5 years ago
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    yep,thanks i'll tel you the feed back tomrw ,pls help me with the last two parts of my homework

  33. amistre64
    • 5 years ago
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    black = 22 and white = 21 and 1/3 by those measurements

  34. amistre64
    • 5 years ago
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    whats the last two parts of your homework?

  35. amistre64
    • 5 years ago
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    Doh, I drew 13 tiles...let me reccount that..

  36. anonymous
    • 5 years ago
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    its going on grt though...

  37. amistre64
    • 5 years ago
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    You need 23 and 1/3 black tiles and 23 and 1/3 white tiles. Better buy 24 :)

  38. anonymous
    • 5 years ago
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    24 black tiles.right ...the front of the roof is in the shape of a isosceles triangle.the side of the roof are 50cm longer at the ends of the roof hiegh is 1,7m .calculate the lenght of the sides of the of the triangle

  39. amistre64
    • 5 years ago
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    is the height from ground level to the peak or is it from the ceiling line to the peak? This information only makes sense if we have a triangle that has a height of 1.7m and has little (50cm) overhangs extending beyond the base. Is the right?

  40. anonymous
    • 5 years ago
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    from the ceiling line to the peak.thats right the triangle height is 1,7m yes you right

  41. amistre64
    • 5 years ago
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    An isoTriangle has 60 degree corners; and the the sin(60) = 170cm/x(cm) x = 170/sin(60); then add the 50cm to get: x = 170/sin(60) + 50. Does that work for you?

  42. anonymous
    • 5 years ago
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    explain more

  43. amistre64
    • 5 years ago
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    246.3 cm is the answer I get. But to explain more: Have you learned about sine, cosine, and the functions of angles yet?

  44. amistre64
    • 5 years ago
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    or just the pythagorean theorum?

  45. anonymous
    • 5 years ago
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    no

  46. amistre64
    • 5 years ago
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    Do you know the pythagorean theorum then? x^2 + y^2 = r^2 ?

  47. anonymous
    • 5 years ago
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    @amistre, do u know DeMorgan's laws?

  48. anonymous
    • 5 years ago
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    i dont know them

  49. amistre64
    • 5 years ago
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    @think; I have vaguely seen it, but I havent gone over it any. Whats it about?

  50. anonymous
    • 5 years ago
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    its related to sets & functions

  51. anonymous
    • 5 years ago
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    dont we start by converting the 50cm to meters

  52. amistre64
    • 5 years ago
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    Kab: in order to solve this problem; you need to know how to solve right triangles. and you solve them with a formula that says the height^2 + base^2 is equal to the slanted part^2

  53. amistre64
    • 5 years ago
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    @think; not in my repetoire yet :)

  54. amistre64
    • 5 years ago
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    and a right triangle is just half of a square. do you know that?

  55. anonymous
    • 5 years ago
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    bye guys..u both cont..gotta go

  56. amistre64
    • 5 years ago
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    Ciao think :)

  57. anonymous
    • 5 years ago
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    all d best wid ur discussion c u 'll the nxt time

  58. anonymous
    • 5 years ago
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    (H)^2+(B)^2 (1,7)^2+(0,05)^2 2.89m+0.0025m=2.89m^2 i converted the 50cm to meter which is 0,05

  59. amistre64
    • 5 years ago
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    you are on the right track, but I have to point something out to you first. for starters the 50 sm is something we will add at the end because it is not a part of the triangle to begin with. second; we dont know the B yet in order to find the length of the side of the roof. But we do know (because it is an isosolec(sp?) triangle) that the length of the roof is twice B. So lets set up out formula like this: (1.7)^2 + B^2 = (2B)^2 1.89 = 4B^2 - B^2 1.89 = 3B^2 1.89/3 = B^2 ...now square root both sides. sqrt(1.89/3) = B the length of the roof is twiceB 2(sqrt(1.89/3)) = 2B = length of one side of the roof; after you get this number add the overhang of (50cm.) Make sense?

  60. anonymous
    • 5 years ago
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    to make things easy for me may you please give the the hole sum and answer

  61. amistre64
    • 5 years ago
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    Yes, If I did it correctly; I get 2(170)/sqrt(3) + 50 196.3 cm + 50 cm = 246.3 cm is the roofs length on each side. or 2.463 meters

  62. anonymous
    • 5 years ago
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    do you stil have time for the last one, calculate the lenght and breadth of the parallelogram

  63. amistre64
    • 5 years ago
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    I got lotsa time... at least 4 hours :)

  64. amistre64
    • 5 years ago
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    lets go over to that posting for it tho.

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