Question

For a rectangle the length and breadth area increased by20% respectively the percentage increaasef area is

Answer 1

let length be l and breadth be b
area=lb
new length and breadth is 1.2l,1.2b
new area =1.2l*1.2b
=1.44lb
increase in area=1.44lb-lb
=0.44lb
%increase =(.44lb/lb)*100
=44%