HELP PRIZE ALOT OF BRAINLEIES

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x

i have not got your picture clearly so see it once again

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!