The area of the Rest room is 40 m2 that of a longer wall 10 m2 and of the shorter wall 1 m2, find the edge of the new cube?	Select:  A) 40 m3  B) 10 m2  C) 80 m3  D) 20 m3  E) 50 m3
lb = 40 ; lh = 10 ; fh = 1   (lbh)2 = 40 * 10 * 1 =&gt; lbh = 20 m3   ANSWER:20 m3
<result>D</result>
The area of the Rest room is 40 m2 that of a longer wall 10 m2 and of the shorter wall 1 m2, find the edge of the new cube?