If the length of a rectangle is halved and its breadth is tripled, what is the percentage change in its area? Answers:	A) 25% increase	B) 25% decrease	C) 50% decrease	D) 50% increase	E) 75% increase
Let original length =10   original breadth =10   Then, original area =10×10=100   Length is halved   ⇒ New length =10/2= 
<gadget id="calculator">10/2</gadget>
<output>5</output>
5   breadth is tripled.   ⇒ New breadth=10×3=30   New area =5×30=150   Increase in area= new area - original area   =150−100=50   Percentage increase in area=increase area/original area×100   =50/100×100   =50%   ANSWER:50% increase
<result>D</result>
If the length of a rectangle is halved and its breadth is tripled, what is the percentage change in its area?