Question

if the length of rectangle increases by 20% wheras its width decreases by 20% the change in its area is ?​

Answer 1

Step-by-step explanation:

Let L, B & A be the initial length , breadth & area respectively of the rectangle. Hence, increase in area = (108/100 -1). l.b = 8/100*lb = 8% .

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Answer 2

Answer:

The area will be decreased by - 4%.

Step-by-step explanation:

Let,

°L = 10

°W=10

°Area= 10*10=100

Now,

L increase by 20% = 10*20%=2

So, L=10+2=12

W= 10-2 =8

Now,

A=12*8 = 96

96-100/100 *100 = -4%