#1**+1 **

We have the volume of a hemisphere and the volume of a cylinder

The hemisphere has a radius of 10m / 2 = 5m

And its volume = (2/3) * pi (radius)^3 = (2/3) * pi (5)^3 = (250/3) pi m^3

The cylinder has a radius of 5 and a height of 25m

Its volume is pi (radius)^2 (height) = pi (5)^2 ( 25) = 625 pi m^3

So..... the total volume is

pi ( 250/3 + 625) m^3 = (2125 / 3) pi m^3

CPhill
May 4, 2017