A dealer declares to sell at cost price, but uses a false weight of 900 gms for 1 Kg. what is his gain percentage.A10%B9%C11 1/9%D9 1/11%Answer: C. 11 1/9%Read Explanation:Gain percent = [Error/True valute - Error] x 100 = 100/1000 - 100 x 100 =(100 x 100) / 900 = 11 1/9%Open explanation in App