Question

If the length of a rectangle is increased by 20 percent and decreased by 10 percent , find the net percent change in the area of that rectangle​

Answer 1

Step-by-step explanation:

Let 'I' be the length lncrease = 20%

New length = 120100l=65l

Let b be the width. Decrease = 20%

New width = 80100b=45b

Original area = lb

New area = 65l×45b=2425lb

Change in area = lb−2425lb=125lb

Percentage in decrease = 100×125= 4%

Answer 2

Answer:

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