Instead of a metre scale, a cloth merchant uses a 120 cm scale while buying, but uses an 80 cm scale while selling the same cloth. If he offers a discount of 20% on cash payment, what is his overall profit percentage?  Choose the correct answer: A) 20% B) 25% C) 40% D) 15% E) None of these
Explanation :   Assume that the merchant while purchasing, purchases 120cm at Rs120 , that is 1cm at Rs1.   He sells 80 cm at Rs 120.   While the original CP = Rs 80 for 80 cm.   20% discount on 120 = 24,   So, actual SP = 120-24= 
<gadget id="calculator">120-24</gadget>
<output>96</output>
96   Profit= 96-80= 
<gadget id="calculator">96-80</gadget>
<output>16</output>
16   P%= (P/CP) x 100 = (16/80) x 100 = 20%.   20%nswer : 20%
<result>A</result>
Instead of a metre scale, a cloth merchant uses a 120 cm scale while buying, but uses an 80 cm scale while selling the same cloth. If he offers a discount of 20% on cash payment, what is his overall profit percentage?