Question

Can Someone please help me.

Answer 1

It's D because you are finding the volume of the shape.Example see that small shape at the top put a line at the bottom of that shape so if you got your two shapes of their own volume,last you will add them.

Answer 2

(8*5*4) + (4*4*4)
8*5*4 for the prism at bottom
4*4*4 for the cube on the top