Multiple choice

By selling a book for Rs. 10, the publisher loses $\displaystyle \frac{1}{11}$ of what it costs him. His cost price is ....

  1. Rs. 9

  2. Rs. 10

  3. Rs. 11

  4. Rs. 12
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Loss = (1/11) * Cost. Selling Price = Cost - Loss = Cost - (1/11)Cost = (10/11)Cost. 10 = (10/11)Cost. Cost = 11.

AI explanation

The condition states that the loss is 1/11 of the cost price, giving the equation Cost Price - 10 = Cost Price / 11. By multiplying the entire equation by 11, we get 11 times the Cost Price minus 110 equals the Cost Price. Solving this, 10 times the Cost Price equals 110, making the cost price 11. His cost price is Rs. 11.

Keep practicing — related questions