The length of a rectangle is reduced by 30%. By what % would the width have to be increased to maintain the original area?  Options
A) 42.8%
B) 20%
C) 25%
D) 30%
E) 35%
Sol. Required change = (30*100)/(100-30)=42.8%   42.8%
<result>A</result>
The length of a rectangle is reduced by 30%. By what % would the width have to be increased to maintain the original area?