A trader sells 80 meters of cloth for Rs. 9000 at the profit of Rs. 23.5 per metre of cloth. What is the cost price of one metre of cloth?	Choose one
A) 22  B) 89  C) 90  D) 78  E) 80

Rationale: "sp of 1 m of cloth = 9000 / 80 = rs . 112.5 cp of 1 m of cloth = sp of 1 m of cloth - profit on 1 m of cloth = rs . 112.5 - rs . 23.5 = rs . 89 . answer : b"
Answer: B