A rectangular cube has a volume of 7 cubic feet. If a similar cube is twice as long, twice as wide, and twice as high, then the volume, in cubic feet of such cube is?
Choices Choose the correct choice from the following answers: A) 24 B) 48 C) 56 D) 80 E) 100
Lets say the sides of the rectangular cube are x, y and z. Problem states volume is 7.   i.e,   x*y*z = 7 .   If every side is increased twice as before. then new volume is   2x*2y*2z = 8*(x*y*z)  2 *2 *2= 
<gadget id="calculator"> 2 *2 *2</gadget>
<output>8</output>
8*(x*y*z)= 8*7= 
<gadget id="calculator">8*7</gadget>
<output>56</output>
56.   Answer is 56
<result>C</result>
A rectangular cube has a volume of 7 cubic feet. If a similar cube is twice as long, twice as wide, and twice as high, then the volume, in cubic feet of such cube is?
Choices