Question

A dishonest milkman buys milk at rs.6 per litre and adds one third of water to it and sells the mixture at rs.7.20 per litre. The gain is

Answer 1

Cost price of 1 litre milk = ₹6

adds one third of water to it

1/3 of 1 litre = 1/3litre = 0.33litre

so the combination of water and milk = 1 + 0.33 litre = 1.33 litre..

the cost of 1.33 litres of milk (mixed with water) = ₹6

then cost of 1 litre will be

(6/1.33)×1= 4.51 = cost price

selling Price =7.20.

Selling Price > Cost price

so profit exists

profit/gain = selling Price - cost price

= 7.20 - 4.51

=2.69

Answer 2

The attachment for the solution is below .