Question

By selling a book for ₹972, a profit of 8% is made. Find the cost price of the book.

Answer 1

Answer: The Cost Price of the book is: ₹900.

Explanation:

Let the cost price of the book be: x.

Therefore according to the question:

`x+(x*(8)/(100))= 972`

→
`(100x+8x)/(100) =972`

→
`(108x)/(100) = 972`

→
`x= (972*100)/(108) \\`

→
`x=900.`

Hence, The Cost Price of the book is ₹900.

Answer 2

Explanation:

selling price (SP)= ₹972

Profit made= 8%

Profit% = ((SP - CP)/CP) × 100

8 = ((972 - CP)/CP) × 100

8 ÷ 100 = (972 - CP)/CP

0.08 CP = 972 - CP

0.08 CP + CP = 972

1.08 CP = 972

CP = 972 ÷ 1.08

CP = Rs 900