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?

A. 450 m³
B. 100 m²
C. 60 m³
D. 400 m³

lb = 20 ; lh = 15 ; fh = 12

(lbh)² = 20 * 15 * 12 => lbh = 60 m³

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?