Question

LIIVI
7
22. A trader sells a book for 75 and finds that his gain percent is equal to the number of rupees
he paid for the book. Find the cost price of the book.​

Answer 1

Answer:

Rs. 50

Step-by-step explanation:

Book price- 75, Cost - x, Gain%= cost

Price = x+ x% of x=75

x+x*x/100=75  

x^2+100x-7500=0

Integer solution of the equation is x=Rs. 50

Proof:

50+50% of 50=50+25=75

Answer 2

Answer:

The answer is Rs.50

Step-by-step explanation: