Question

7. A rectangle has an area of 20 cm?. If its length is reduced by 2.5 cm and its width is increased by 3 cm, the new shape is a square. What is the perimeter of the square ?
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Answer 1

Perimeter of the square =4a=4×12.5=50cm

Let the breadth of the rectangle =b cm.

Perimeter of the rectangle =2(l+b)=50cm

=>16+b=25

=>b=9 cm

Area of the rectangle =l×b=16×9=144cm2

I hope it will help you.

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