how much work does it take to pump water from a full upright tank circular cylindrical tank with radius 5m and a height of 10m to a level of 4m above the top of the tank

Answer 1

If I'm correct....
You would multiply pi times radius squared times height to get the volume of the cylinder tank.
3.14x25x14=____
3.14x25 is 78.5
And 78.5x14=______

Hope this helps

Answer 2

the work is what it takes to move the center of gravity of the water's weight the required height. The center of mass is h/2 meters below the top of the tank, so the distance to be moved is h/2 + 4 meters.

If d is the density of water, in kg/m^3, then mdg is the weight of the mass of water, and the work is

πr^2h * dg * (h/2 + 4)