Question

Q20. A scientist mixes 10% water in his solution but
he is not content with it so he again mixes 10% more
water in the previous mixture. What is the profit
percentage of the scientist if he sells it at cost price:​

Answer 1

Answer:

21 %

Step-by-step explanation:

Let scientist 100 ml of the solution

10% of the 100 ml = 10 ml

New volume of solution is 110 ml

10% of 110 ml is 11 ml

The final volume of solution is 121 ml

21 / 100 = 21 %