If each edge of a cube is increased by 50%, the percentage increase in its surface area is
Given,
Increment in each edge of a cube = 50%
Let original length of edge of cube = a
Original surface area of cube = 6 a2
After increment ,
New length of edge = a + a
New surface area of cube = 6a2 = 6× 
Increase in area = 
% increase in area = 
8