Here's the question you clicked on:
jlovexx
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 263.7 square meters 615.2 square meters 1,435.5 square meters
hmm you aren't given much info so what i would do is just a ratio. i'm assuming they're proportional and i'm not 100% sure this is how you do the question but if they are indeed proportional then you have 113 m^2 / 9m = ? / 21m
I agree. So 113/9 = x/21 x = (113/9)*21 x = 263.7, which is one of the choices so you are right.
Oh, I forgot to add 9. I was only using the bigger cylinder