A shopkeeper sells 400 metres of cloth for Rs. 18000 at a loss of Rs.5 per metre. Find his cost price for one metre of cloth? Choose the correct option.
A) rs . 59
B) rs . 58
C) rs . 09
D) rs . 50
E) rs . 13

Rationale: "sp per metre = 18000 / 400 = rs . 45 loss per metre = rs . 5 cp per metre = 45 + 5 = rs . 50 answer : d"
Answer: D