Question

If the length of a rectangle is increased by 20% &
the breath is decreased by 20%. The new 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% .

Answer 2

Answer:

4%

Step-by-step explanation:

assume the length and breadth of a rectangle to be 100 units each

we have area to be 100×100=10000

when the length is increased by 20% and breadth is decreased by 20%

area becomes 120×80=9600

therefore the area has decreased by 400 units