What is the percentage increase in the area of a rectangle, if each of its sides is increased by 20%? Choose the most appropriate option:
A) 42%	B) 43%	C) 45%	D) 44%	E) 46%
Let original length =l   original breadth =b   Then original area =lb   Length is increased by 20%   ⇒ New length =l×120100=1.2l   Breadth is increased by 20%   ⇒ New breadth =b×120100=1.2b   New area =1.2l×1.2b=1.44lb   Increase in area = new area - original area   =1.44lb−lb=0.44lb   Percentage increase in area   =increase in areaoriginal area×100=0.44lblb×100=44%   Answer is 44%.
<result>D</result>
What is the percentage increase in the area of a rectangle, if each of its sides is increased by 20%?