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This is pretty much one long cylinder. r is given as 3 and h is 24 because there are 3 cylinders joined together.
i got 100.48
that's not it. did you the formula in your link?
can you show me what you did?
2(pi)r^2 = 2(3.14)*(2)*(2)
r = 3 in the picture
2(pi)rh = 2(3.14)*(2)*(6) = 75.36
oh opps thats the wrong one
this one.. i am looking at
ok. so then you need to use 18 for h because you have three 6" cylinders back to back
let me change it
i mean 226.08
yes and then add the 25.12 you got for the circles
226.08+25.12 = 251.2
yes. that's it
ok can u help me with the other one
since ur the genius here
First find the area of the prism
yes the box. Do you need help with that part? |dw:1435191242466:dw|
right. and you need to do that for each side of the box. |dw:1435191340603:dw|
So the top, bottom, front, and back are 176 The left and right are 121. And you add them all up to get the surface area of all six sides Does that make sense?
ok yea it does
what did you get for that part?
4 sides with are 176 and 2 side with area 121 SA = 4*176 + 2* 121
so 2(pi)^2 =2(3.14)*(4)*(4) =100.48
2(pi)rh = 2(3.14)*4*9 =226.08
leave this part out. so 2(pi)^2 =2(3.14)*(4)*(4) =100.48
that section is already included in the rectangle. Using it results in double counting
huh? ok u confused me
so A = 704+242+226.08
yes i got that
cool. that's the answer
do i add 226.08 + 100.48?
no just leave the 100.48 out completely
226.08 is wrong how??
Did you add the 704 and 242? |dw:1435193990696:dw|
A = 704+242+226.08 = 1051.08