Question

I sold a book at a profit of 12%. Had I sold it for Rs.18 more. 18% would have been gained find the cost price

Answer 1

CP of book will be ₹300..
Difference of profit is 6% and amount is 18.. So Whose 6% is 18 is the required amount.. Hence 300 will be right answer.

Answer 2

Answer:

The cost price of book is Rs. 300.

Step-by-step explanation:

Let the CP of book be x.

I sold a book at a profit of 12%. The selling price of book is

$SP_1=x(1+\frac{12}{100})=x(1+0.12)=1.12x$

If it is sold for Rs 18 more, then the profit is 18%.

$1.12x+18=x(1+\frac{18}{100})$

$1.12x+18=1.18x$

$18=1.18x-1.12x$

$18=0.06x$

$\frac{18}{0.06}=x$

$300=x$

Therefore the cost price of book is Rs. 300.