The length of a rectangle is increased by 30% and the breadth is decreased by 25o/". What is the percentage change in the area of the rectangle due to this
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let length = L
Breadth = B
Area = LB
New Length = L+30L/100 = 130L/100
New Breadth = B- 25B/100= 75B/100
New Area = 130×75LB/10000 = 0.975LB
Change in Area = (LB- 0.975LB)*100/LB= 0.025LB*100/LB = 2.5 % Decrease
Breadth = B
Area = LB
New Length = L+30L/100 = 130L/100
New Breadth = B- 25B/100= 75B/100
New Area = 130×75LB/10000 = 0.975LB
Change in Area = (LB- 0.975LB)*100/LB= 0.025LB*100/LB = 2.5 % Decrease
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