I don't know how to do this, I tried and got it wrong. I know the answer but can someone please take me through the steps. It's for the calculator paper.

The volume of the sphere is 5000cm cubed.

The radius of the sphere is 10.6cm to one decimal place.

The sphere is sliced through the centre to make 20 identical pieces.

Calculate thetotalsurface area of one of the pieces.

How do I do this? Thanks in advance :)