Question

He length of rectangle is increased by 40% and its breadth decreased by 30%. the change in the area of the rectangle is ?

Answer 1

let's considerd the length of rectangle be 100m
also considerd the bredth be 100m
Then area of rectangle is 10000m
Increase in length= 40% of 100cm =100+40=140m
Increase in bredth=100-30=70m
New area=140*70=9800
Area of rectangle will decreased by 200m
Then the percentage is 200/10000*100=2%