Question

Cost of 15 books is 450, find the cost of 1 book

Answer 1

Step-by-step explanation:

Let cost price of one book be ₹x

Thus cost price of 15 books will be 15x

Selling price of 12 books will be 15x

Selling price of one book is 15x/12 = 1.25x

We know Profit % = (selling price - cost price)/cost price ×100

Profit % = (1.25x - x)/x × 100

= 0.25x/x × 100

= 0.25 × 100

= 25%

Answer 2

Answer:30

Step-by-step explanation:

Cost of 1 book: cost of 15 books/ no of total books(15)

Cost of 1 book: 450/15=30