Answered

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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

Sagot :

Answer:

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

[tex]2\pi r(h+r)[/tex]

Radius=8/2=4 feet

we get,

Surface area of a tank is,

[tex]=2\times3.14\times4(20+4)[/tex][tex]=6.28\times96[/tex][tex]=602.88\approx602.9ft^2[/tex]

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

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