2 Answers

Dave Manning · Answer 1 · 2019-09-10T10:01:18+0000

The radius of the cylindrical tank = 15ft.

Height of the cylindrical tank = 60ft.

We know that the surface area of cylinder =
$2\pi r^2+2\pi rh$

Here, r = 15ft and h = 60ft.

By placing the values in the formula we will get,

Surface area =
$2\pi (15)^2+2\pi (15)(60)$

=
$2\pi (225)+2\pi (15)(60)$

=
$450\pi +2\pi (15)(60)$

=
$450\pi +2\pi (900)$

=
$450\pi +1800\pi$

=
$2250\pi$

=
2250(3.14) , as given
$\pi = 3.14$

=
7065

We have got the required answer.

Surface area of the tank =
7065 ft^2

The correct opttion is D.

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