Question

How much water must be added to a cask which
contains 40 litres of milk at cost price Rs.3.5
per litre, so that the cost of milk reduces to Rs.2
per litre?​

Answer 1

Answer:

How much water must be added to a cask which

contains 40 litres of milk at cost price Rs.3.5

per litre, so that the cost of milk reduces to Rs.2

per litre?​

Explanation:

let us assume water is free of cost and now

cost for 1 ltr of milk is 3.50

total cost is 3.50*40=140 rupees

so to decrease the cost of milk per litre amount of milk should increased and to increase amount of milk we should add water

3.5*40=2*x

x=3.5*40/2

x=70

so add 30 ltrs of water to 40 ltrs of milk and total volume of milk will be 70 and cost per ltr will be decreased to 2.00/-