A shop owner sells 25mtr of cloth and gains SP of 10 mtrs. Find the gain %?	Pick one:  A) 30 %  B) 40 %  C) 50 %  D) 66.67 %  E) 70 %

Rationale: "here , selling price of 10 m cloth is obtained as profit . profit of 10 m cloth = ( s . p . of 25 m cloth ) – ( c . p . of 25 m cloth ) selling price of 15 m cloth = selling price of 25 m of cloth let cost of each metre be rs . 100 . therefore , cost price of 15 m cloth = rs . 1500 and s . p . of 15 m cloth = rs . rs . 2500 profit % = 10 / 15 × 100 = 66.67 % profit of 66.67 % was made by the merchant . d"
Answer: D