Two similar cylinders are shown in the image below.

If the smaller cylinder has a lateral area of approximately 113 square meters, what is the approximate lateral area of the larger cylinder?

48.4 square meters

615.2 square meters

1,435.5 square meters

263.7 square meters

Question

Two similar cylinders are shown in the image below. 
  
  

If the smaller cylinder has a lateral area of approximately 113 square meters, what is the approximate lateral area of the larger cylinder? 

 48.4 square meters 

 615.2 square meters 

 1,435.5 square meters 

 263.7 square meters

anonymous · Answer

attachment

callisto · Answer

I'm not sure if this works :)
For similar figure,
Ratio of area = (ratio of side)^2
(113/A) = (9/21)^2
A = 113/ (9/49)
And you'll get answer, which is one of the option there.

anonymous · Answer

so 113 divided by 9 49ths?

callisto · Answer

$$\frac{113}{\frac{9}{49}}$$

anonymous · Answer

hold on doings something for meh mom

anonymous · Answer

ok and im the only one in here..

callisto · Answer

Hmm.. do you understand that now?

anonymous · Answer

yes :D

anonymous · Answer

it was 615.2

callisto · Answer

I got the same answer as yours :)