Mohan sold a book at a loss of 40%. If the selling price had been increased.........What was the cost price of the book?

Question

Mohan sold a book at a loss of 40%.
If the selling price had been increased by Rs. 200, there would have been a gain of 10%.
What was the cost price of the book?

Answer 1

Rs. 400
.
Rs. 200 = 50% of the cost price.
Book cost price = Rs. 400

Answer 2

Let X = Cost Prize
Mohan sold the book at X x (1-0,4) = X x 0,6
Then,
X x 0,6 + 200 = X x 1,1
Solving the equation, X = 400 Rs