The length of a rectangle is twice its breadth. If its length is decreased by 5 cm and breadth is increased by 5 cm, the area of the rectangle is increased by 75 sq. cm. Find the length of the rectangle. Answers:	A) 10 cm	B) 20 cm	C) 30 cm	D) 40 cm	E) 50 cm
Let breadth = x. Then, length = 2x. Then,   (2x - 5) (x + 5) - 2x * x = 75 &lt;=&gt; 5x - 25 = 75 &lt;=&gt; x = 20.   :. Length of the rectangle = 20 cm.   ANSWER 20 cm 20 cm
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The length of a rectangle is twice its breadth. If its length is decreased by 5 cm and breadth is increased by 5 cm, the area of the rectangle is increased by 75 sq. cm. Find the length of the rectangle.