The length of a rectangle is twice its breadth if its length is decreased by 5cm and breadth is increased by 5cm, the area of the rectangle is increased by 75 sq cm. Find the length of the rectangle? Choose the correct choice from the following:
A) 22 cm B) 40 cm C) 28 cm D) 10 cm E) 11 cm
let length = 2x and breadth = x then   (2x-5) (x+5) = (2x * x)+75   5x-25 = 75 =&gt; x=20   length of the rectangle = 40 cm   Answer: 40 cm
<result>B</result>
The length of a rectangle is twice its breadth if its length is decreased by 5cm and breadth is increased by 5cm, the area of the rectangle is increased by 75 sq cm. Find the length of the rectangle?