A reduction of 20% in the price of salt enables a lady to obtain 10 kgs more for Rs.100, find the original price per kg?
A. 2 3/2
B. 2 2/3
C. 2.5
D. 3
Explanation:
100*(20/100) = 20 — 10
? — 1 => Rs.2
100 — 80
? — 2 => Rs.2.5