Question

Two similar cylinders have heights 6 inches and 10 inches.

What is the ratio of their surface areas?

Answer 1

1 : 4
3 : 5
9 : 10
9 : 25

Answer 2

3:5

Answer 3

How do you know?

Answer 4

two similar cylinders means they have the same radius (r) of each.
let us take the heights are h1 and h2
and the surfaces are A1 and A2
A1 = 2 x (pi) x r x h1
A2 = 2 x (pi) x r x h2
A1/A2 = h1/h2 = 6/10 = 3/5

Answer 5

Ok, Cool, thank you, and welcome to Openstudy. (If you're new) :D

Answer 6

sure.
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Answer 7

thats wrong