Calculate the percentage increase in the area of a rectangle, if each of its sides is increased by 10%?
Select:  A) 20%  B) 29%  C) 27%  D) 24%  E) 21%
Assume original length = 100m by 50m   original area = 100*50= 
<gadget id="calculator">100*50</gadget>
<output>5_000</output>
5000   10% increase on each side   l= 100 + 10= 
<gadget id="calculator">100 + 10</gadget>
<output>110</output>
110   w= 50 + 5= 
<gadget id="calculator">50 + 5</gadget>
<output>55</output>
55   new area= 110*55= 
<gadget id="calculator">110*55</gadget>
<output>6_050</output>
6050   increase in area= 6050 - 5000= 
<gadget id="calculator">6050 - 5000</gadget>
<output>1_050</output>
1050   %increase=21%   Answer 21%
<result>E</result>
Calculate the percentage increase in the area of a rectangle, if each of its sides is increased by 10%?