Question

if you find it you will get 15points if the length of the rectangle are increased by 10 persent . breath decrease in 12 percent find the change percent in area

Answer 1

Area would decline by 3.2%
(10-12)*-120/100=-3.2%

Answer 2

Present area = LB (L stands for length and B stands for breadth)
New length = L+(10L/100)= 11L/10
New breadth = B-(12B/100) = 88B/100
.•. new area = (11B/10)*(88B/100) = 968LB/1000
.•. Change in area = LB-(968LB/1000) = 32LB/1000
.•. Change percent in area = (32LB/1000)*100/(LB) = 3.2%

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