The area of the floor of a room is 20 m2 that of a longer wall 15 m2 and of the shorter wall 12 m2, find the edge of the new cube?  Choices
A) 450 m 3 B) 100 m 2 C) 60 m 3 D) 400 m 3 E) 500 m 3

Rationale: lb = 20 ; lh = 15 ; fh = 12 ( lbh ) 2 = 20 * 15 * 12 = > lbh = 60 m 3 answer : c
Answer: C