A shop owner sells 30mtr of cloth and gains SP of 10 metres. Find the gain %? Answers:	A) 30%	B) 40%	C) 50%	D) 56%	E) 78%
Here, selling price of 10 m cloth is obtained as profit.   Profit of 10 m cloth = (S.P. of 30 m cloth) – (C.P. of 30 m cloth)   Selling price of 20 m cloth = Selling Price of 30 m of cloth   Let cost of each metre be Rs. 100.   Therefore, cost price of 20 m cloth = Rs. 2000 and S.P. of 20 m cloth = Rs. Rs. 3000   Profit% =	10	× 100 = 50%   20   Profit of 50 % was made by the merchant.   50%
<result>C</result>
A shop owner sells 30mtr of cloth and gains SP of 10 metres. Find the gain %?