SOLUTION: Use the formula for the volume of a cylinder to find the volume of a water cistern with a radius of 10 feet and a height of 40 feet. I had 2*3.14159*10^2+2*3.14159*10*40=3141.

Algebra ->  Surface-area -> SOLUTION: Use the formula for the volume of a cylinder to find the volume of a water cistern with a radius of 10 feet and a height of 40 feet. I had 2*3.14159*10^2+2*3.14159*10*40=3141.      Log On


   

Question 575762: Use the formula for the volume of a cylinder to find the volume of a water cistern with a radius of 10 feet and a height of 40 feet.

I had 2*3.14159*10^2+2*3.14159*10*40=3141.59
Answer by KMST(5328) About Me  (Show Source):
You can put this solution on YOUR website!
Wrong formula. You calculated the surface area.
The volume of a cylinder of radius r and height h is calculated as
V=pi%2Ar%5E2%2Ah
The surface area of the cylinder (top, bottom and curvy side added together is
A=2%2Api%2Ar%5E2%2B2%2Api%2Ar%2Ah