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