Calculus, find the volume of the 3d object ?

I don't remember all my calculus equations, but your answer is wrong. I say this because while the bowl has a diameter of 30cm, the water may not be to the top of the bowl. It says it is poured in to a depth of h which makes the depth of the water an integer and not a numeric value. So you need to find an equation that takes into account a changing depth of water in a 30cm diameter hemispheric bowl as well as subtracting the volume of the ball from it (also, it never says that the ball is heavier then water but I would ume since it did state it was a heavy ball that can be implied). Wish I could help more.