The length of a rectangle is reduced by 15%. By what % would the width have to be increased to maintain the original area?  Choices.
A) 10%  B) 20%  C) 17.6%  D) 30%  E) 35%
Sol. Required change = (15*100)/(100-15)=17.6%   17.6%
<result>C</result>
The length of a rectangle is reduced by 15%. By what % would the width have to be increased to maintain the original area?