Question

If the length and width of a rectangular solid are increased by 10% and the height is increased by 20%, by what percent is the volume of the solid increased

Answer 1

LWH=V

increasse by 10% means times 1.10
increase by 20% is times 1.20



L turns to 1.1L
W turns to 1.1W
H turns to 1.2H

(1.1L)(1.1W)(1.2H)=1.452LWH
so it is increased by 45.2%