Question

Suppose a gas tank is in the shape of a cylinder. The tank is 20 feet long and 8 feet in diameter. Find the amount of metal used to construct the tank. (Hint: use 3.14 for pi)A) 384.5 ft^2B) 1028 ft^2C) 602.9 ft^2D) 1570.4 ft^2

Answer 1

Given that,

a gas tank is in the shape of a cylinder. The tank is 20 feet long and 8 feet in diameter.

To find the amount of metal used to construct the tank.

That is, to find surface area of a tank.

we know that,

Surface area of a cylinder is

`2\pi r(h+r)`

Radius=8/2=4 feet

we get,

Surface area of a tank is,

`=2*3.14*4(20+4)`
`=6.28*96`
`=602.88\approx602.9ft^2`

Answer is: option (C): 602.9 ft^2