The radius of the cylindrical tank = 15ft.
Height of the cylindrical tank = 60ft.
We know that the surface area of cylinder = [tex] 2\pi r^2+2\pi rh [/tex]
Here, r = 15ft and h = 60ft.
By placing the values in the formula we will get,
Surface area = [tex] 2\pi (15)^2+2\pi (15)(60) [/tex]
= [tex] 2\pi (225)+2\pi (15)(60) [/tex]
= [tex] 450\pi +2\pi (15)(60) [/tex]
= [tex] 450\pi +2\pi (900) [/tex]
= [tex] 450\pi +1800\pi [/tex]
= [tex] 2250\pi [/tex]
= [tex] 2250(3.14) [/tex], as given [tex] \pi = 3.14 [/tex]
= [tex] 7065 [/tex]
We have got the required answer.
Surface area of the tank = [tex] 7065 ft^2 [/tex]
The correct opttion is D.
