Area of a rectangle is 150 m² . When the breadth of the same rectangle is increased by 2 m and the length decreased by 5 m, the area of the rectangle decreases by 30 m². What is the perimeter of the square whose sides are equal to the length of the rectangle

Area of rectangle = 150

l×b= 150                       ....(i)

According to question,

lb-(l-5)(b+2) = 30

lb-lb-2l+5b+10=30

5b-21=20                        ....(ii)

By solving questions (i) and (ii) we get,

l = 15 m

b = 10 m

The side of square = l = 15 m

∴ Perimeter of square = 4 × 15

= 60 m