Question

A cylindrical grain bin has a radius of 9 feet and a height of 30 feet. What is the surface area of the bin?

Answer 1

The side wall of the cylindrical grain is:
\[A=2 \Pi rh\]
The area of the 2 circles, the top and the bottom:
\[2 \Pi r ^{2}\]

Answer 2

And the total would be the sum of those areas:
\[A_{Tot}=2 \Pi r(h+r)\]
All simplified

Answer 3

A cylindrical grain bin has a radius of 9 feet and a height of 30 feet. What is the surface area of the bin?


1,808.64 ft2

1,949.94 ft2

1,356.48 ft2

2,204.28 ft2

which one

Answer 4

Last one, just substitute the value of each variable in the equation