Question

Find the profit if the cost price of a book is rs.50 and its selling price rs 80

Answer 1

30 is profit

Explanation:

80-30=50rs

Answer 2

Rs.30

Explanation:

profit is defined as the difference between sales revenue and cost.

the formula is

`p = r - c`

where p is profit, r is revenue/sales price, and c is cost.

here, we substitute r as 80 and c as 50.

so,

`p = 80 - 50 = 30`

our profit is therefore Rs.30