What will be the percentage increase in the area of the cube's surface if each of the cube's edges grows by 60%? Answers.
A) 150% B) 160% C) 156% D) 158% E) 162%
The question is very easy. My logic is the following:   A surface = 6*a^2   After 60% increase A surface = 6* ((1.6a)^2) = 6*2.56*a^2   The increase in the surface area = (6*2.56*a^2 - 6*a^2)/6*a^2 = (6*a^2(2.56-1))/(6*a^2) = 2.56-1= 
<gadget id="calculator">2.56-1</gadget>
<output>1.56</output>
1.56= 156%   Answer :156%
<result>C</result>
What will be the percentage increase in the area of the cube's surface if each of the cube's edges grows by 60%?