Question

A Petrol pump owner mixes 10% kerosene in petrol but he is not content with it so he again mixes 10% more kerosene in the previous mixture. What is the profit percentage of Petrol pump owner if he sells it at cost price?
A) 11.11%
B) 20%
C) 21%
D) 12.10%

Answer 1

let petrol =100

10%kerscene mixed=110

again 10% mixed =121

profit =21

profit %=17.3 %