Help with permutations please

9/10 divide by -3/15 as a mixed number

Prism m and pyramid n have the same base area and the same height. cylinder p and prism q have the same height and the same base perimeter. cone z has the same base area as cylinder y, but its height is three times the height of cylinder y. the figures and have the same volume.

Hello, i need compare km^2 and km. what's difference in this?