Posted by bob on .
Direct and Joint Variation
2. The volume V of a rectangular prism of a particular height varies jointly as the length l and the width w, and V = 224 ft when l = 8 ft and w = 4 ft.
Find l when V = 210 ft and w = 5 ft.

math 
bobpursley,
V= areabase*height= length*width*height