What percentage of the original water has overflowed?

Question

A cubic tank of side 12cm is filled with water. A solid cube of side 4cm is dropped into the water causing some of the water to overflow. What percentage of the original water has overflowed? Answer to one decimal place if necessary.

 

a. 33 1/3    b. 3.7      c. 66 2/3           d. none of these

 

Answer 1

X(12**3)=4**3

27x=1

x=.037 or 3.7%