Question

A fuel-tanker's tank is 50 feet long and has a diameter of seven feet. Determine the surface area of the fuel tank.

Answer 1

1176.679ft²

Explanation:

The question is on surface area of a cylindrical fuel tank

Equation for surface area of a cylinder

S.A = 2
`\pi`rh +2
`\pi`r²

where r is the radius of cylinder and h is height of cylinder

Diameter=7'⇒r=3.5' and h=50'

Surface Area= 2×3.142×3.5×50 + 2×3.142×3.5×3.5

S.A=1099.7+76.979=1176.679ft²

Answer 2

1176.5 square feet

Explanation:

We are given that the length of a fuel tanker is 50 feet and its diameter is 7 feet and we are to find its surface area.

Since fuel tank is a cylinder so we need to find the surface area of this cylinder.

Surface area of cylinder =
`2\pi rh+2\pi r^2`

Substituting the given values (h = 50, r = 7/2 = 3.5)in the above formula:

Surface area of fuel tank =
`2 * \pi * 3.5 * 50 +2 * \pi * (3.5)^2` = 1176.5 square feet