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By selling a book at Rs.125, Ram earns a profit equal to 2/5 th of the selling price. Find the cost price of the book (in Rs.).
Question

By selling a book at Rs.125, Ram earns a profit equal to 2/5 th of the selling price. Find the cost price of the book (in Rs.).

A.

Rs.30

B.

Rs.75

C.

Rs.50

D.

Rs.100

Correct option is B

Given:

Selling price of book = Rs 125

Profit = 2/5 of the selling price.

Formula Used:

Profit = selling price – cost price

Solution:

Let the profit be 7 units.

Profit = 25×Selling Price=25×125\frac{2}{5} \times \text{Selling Price} = \frac{2}{5} \times 125​ = 50 

The cost price is the selling price minus the profit:

Cost Price = 125 - 50 = Rs.75

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