Question

If the length and breadth of a rectangle are decreased by 10% then by what percent will the area of the rectangle decrease

Answer 1

let the length of the rectangle be 20 and breadth be 10 .
then area is 10×20=200
10%×20
10/100×20
=2 and length will be 20-2=18
10%×10
10/100×10
=1
then area will be 18×1=18
the percentage will be 2/20×100
= 10%