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) 40	B) 50	C) 60	D) 70	E) 80
lb = 20 ; lh = 15 ; fh = 12   (lbh)2 = 20 * 15 * 12 =&gt; lbh = 60 m3   Answer: Option 60
<result>C</result>
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?