Question

if the edge of a cube is increased by 50% ,then find the % of increase in surface area and its increase in volume

Answer 1

a'=a+0.5a=1.5a Area'=6a'^2=6 (1.5a)^2=2.25 (6a^2)=2.25Area Percent Increase=(2.25area-area)/area× 100 =1.25×100=125% Vol.'=a^3=(1.5a)^3=3.375a^3=3.375a^3=3.375× Vol. Percent increase =(3.375-1)×100=237.5%

Answer 2

Percent increase in area of the cube is 125 %