The area of the house of a hall is 20 m2 that of a longer wall 10 m2 and of the shorter wall 8 m2, find the edge of the new cube?	Answers:
A) 45 m 3 B) 40 m 3 C) 60 m 3 D) 600 m 3 E) 300 m 3

Rationale: lb = 20 ; lh = 10 ; fh = 8 ( lbh ) 2 = 20 * 10 * 8 = > lbh = 40 m 3 answer : b
Answer: B