Question

The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is

Answer 1

Answer:

44%

Step-by-step explanation:

let the length be l

and breadth be b

therefore it's area=lb

new length of rectangle =l +20%of l

=l+20×l÷100=l + l/5=6l/5

new breadth of rectangle =6b/5

new area=36lb/25

increase in area=36lb/25-lb = 36lb-25lb/25 = 11lb/25

percentage increase =11lb/25lb×100=11×4=44%