A bat is bought for Rs.420 and sold at a gain of 20% find its selling price  Choose the correct choice:
A) s.430/-
B) s.480/-
C) s.400/-
D) s.504/-
E) s.600/-
100 % ------&gt; 420   120 % ------&gt; 420*120/100   Selling price = Rs.504   s.504/-
<result>D</result>
A bat is bought for Rs.420 and sold at a gain of 20% find its selling price