A circular swimming pool has a diameter of 16 meters, the sides are 3 meters high, and the depth of the water is 1.5 meters. The acceleration due to gravity is 9.8 and the density of water is 1000 .

How much work is required to:

(a) pump all of the water over the side?

(b) pump all of the water out of an outlet 2 m over the side?

I know how to find the answer to a, which is 2116800 pi Joules

But for B, what do they mean? Does 2 meter over the side mean the radius changes?

second problem:

A chain 69 meters long whose mass is 23 kilograms is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the top 2 meters of the chain to the top of the building? Use that the acceleration due to gravity is 9.8 meters per second squared.

I know you have to do this in two parts and then add them. I am able to do an example when it is in ft and lbs but the whole kg and meter is confusing me.

I know W=Fd, F=ma, so I did ma=9.8*23= 225.4

How can I do this problem without converting to ft and lbs? Thanks