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moazzam07

  • one year ago

please help medal and Fan

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  1. moazzam07
    • one year ago
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  2. anonymous
    • one year ago
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    Okay I'll help you

  3. anonymous
    • one year ago
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    Multiply by 20

  4. mathstudent55
    • one year ago
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    Each dimension is in the scale 1:20 That means each real length is 20 times the drawing size.

  5. mathstudent55
    • one year ago
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    First, what is 4 inches * 20 ? 5 inches * 20 ?

  6. anonymous
    • one year ago
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    So just think of the scale as a fraction 1 over twenty or 1/20

  7. anonymous
    • one year ago
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    Exactly just multiply by 20

  8. moazzam07
    • one year ago
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    100 and 80

  9. moazzam07
    • one year ago
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    @mathstudent55 its 80 and 100

  10. anonymous
    • one year ago
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    Yes

  11. mathstudent55
    • one year ago
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    Correct. The real dimensions of the room are 80 inches and 100 inches. Now we need to find the area. Since the room is a rectangle, you use the formula for the area of a rectangle A = LW

  12. moazzam07
    • one year ago
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    100 x 80 ?

  13. mathstudent55
    • one year ago
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    Yes. What do you get?

  14. moazzam07
    • one year ago
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    8000

  15. mathstudent55
    • one year ago
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    A = 100 in. * 80 in. = 8000 in.^2 Now we have the are in square inches. The problem wants the are in square feet, so we need to convert.

  16. moazzam07
    • one year ago
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    ok how do we convert

  17. mathstudent55
    • one year ago
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    We need to figure out how many square inches there are in a square foot.

  18. mathstudent55
    • one year ago
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    First, do you know how many inches there are in a foot?

  19. moazzam07
    • one year ago
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    144

  20. moazzam07
    • one year ago
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    12

  21. mathstudent55
    • one year ago
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    |dw:1439780872466:dw|

  22. mathstudent55
    • one year ago
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    Correct. |dw:1439780923987:dw|

  23. moazzam07
    • one year ago
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    There are 144 square inches in a square foot

  24. mathstudent55
    • one year ago
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    Correct also.

  25. mathstudent55
    • one year ago
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    |dw:1439780976584:dw|

  26. moazzam07
    • one year ago
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    ok

  27. mathstudent55
    • one year ago
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    |dw:1439781017032:dw|

  28. mathstudent55
    • one year ago
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    A square 1 ft by 1 ft has an area 1 ft * 1 ft = 1 square foot. 1 foot = 12 inches, so A square 12 inches by 12 inches has an area 12 in. * 12 in. = 144 square inches. This shows that 1 square foot = 144 square inches

  29. moazzam07
    • one year ago
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    would i do 8000 / 12?

  30. mathstudent55
    • one year ago
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    Ok, now we need to convert 8000 square inches into square feet. We know the conversion factor is 144. The question we have is do we multiply 8000 by 144 or do we divide 800 by 144? We can figure it out by reasoning it out. 1 square foot is the same size as 144 square inches. This means that 1 square foot is much larger than a square inch, so much so that it takes 144 square inches to equal 1 square foot. That means that for the same are, it will take many more square inches to fill it up than square feet. Then, if we divide the number of square inches by 144, we get square feet. \(A = LW = 80 ~in. \times 100~ in. = 8000 ~in.^2\) \(A = \dfrac{8000}{144}~ft^2 \)

  31. mathstudent55
    • one year ago
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    Divide 8000 by 144, not by 12.

  32. moazzam07
    • one year ago
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    55.55555555555556

  33. moazzam07
    • one year ago
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    @mathstudent55 is the final answer 55.55556 ft ^2?

  34. moazzam07
    • one year ago
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    @pooja195 is the final answer 55.55556 ft ^2?

  35. mathstudent55
    • one year ago
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    Correct.

  36. moazzam07
    • one year ago
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    ok thanks @mathstudent55

  37. mathstudent55
    • one year ago
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    yw

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