Question

The height of a rectangular solid is 5 times its width and its length is 8 times its height. If the volume of the wall is 102.4 cm3, find its length.

Answer 1

Height of rectangular solid = 5 x width

and length = 8 x height = 8 x 5 x width = 40 x width

Volume = 102.4 cm3

Let width = w

Then height = 40w

and height = 5w