The length of a rectangle is reduced by 20%. By what % would the width have to be increased to maintainthe original area? Choose the correct choice from the following.
A) 12%	B) 20%	C) 25%	D) 30%	E) 35%
Sol. Required change = (20*100)/(100-20)= 
<gadget id="calculator">(20*100)/(100-20)</gadget>
<output>25</output>
25%   25%
<result>C</result>
The length of a rectangle is reduced by 20%. By what % would the width have to be increased to maintainthe original area?