A shop owner sells 50mtr of cloth and gains SP of 10 mtrs. Find the gain %? Choose the correct option.
A) 25 %
B) 40 %
C) 50 %
D) 60 %
E) 70 %

Rationale: here , selling price of 10 m cloth is obtained as profit . profit of 10 m cloth = ( s . p . of 50 m cloth ) – ( c . p . of 50 m cloth ) selling price of 40 m cloth = selling price of 50 m of cloth let cost of each metre be rs . 100 . therefore , cost price of 40 m cloth = rs . 4000 and s . p . of 40 m cloth = rs . rs . 5000 profit % = 10 / 40 × 100 = 25 % profit of 25 % was made by the merchant . a
Answer: A