Question

1. How much water to be added to 14 liters of milk worth Rs. 5.40 a litre so that the value of the mixture may be Rs. 4.20 a litre?
(a) 7 liters
(b) 6 liters
(e) 5 liters
(d) 4 liters


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Answer 1

Answer:

5.25

Step by step explanation:

Given:

Quantity of milk =14 litre

Cost of milk per litre =Rs.5.40

To find: Quantity of water such that after mixing with milk cost of mixture become Rs.4.20

Let x be the Quantity of the water mixed with milk.

We know that water is available at free cost .

According to the question:

x+14×5.40=4.20(x+14)

x+75.6=4.20x+58.8

4.20x-x=75.6-58.8

3.20x=16.8

x=16.8/3.20

x=5.25

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