ok so 1 find volume of 1 cube 2. find total volume of rectangular prism
1/2 m cubes volume=side^3 side=1/2m (I guess since that was what was given) v=1/2^3=1/8
so volume of 1 cube times number of cubes=total volume 1/8m^3 times number of cubes=5m^3 multiply both siides by 8/1 m^3 to clea fraction (since 8/1 times 1/8=8/8=1) number of cubes=40
