Milk contains 5 % water. What quantity of pur | vedclass

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(C) Initial quantity of milk = $10$ litres.Percentage of water in the initial milk = $5 \%$.Quantity of water = $5 \%$ of $10$ litres = $0.5$ litres.L

Vedclass · Accepted Answer

$15$

Vedclass · Answer

(C) Initial quantity of milk = $10$ litres.Percentage of water in the initial milk = $5 \%$.Quantity of water = $5 \%$ of $10$ litres = $0.5$ litres.Let the quantity of pure milk added be $x$ litres.Total quantity of milk after addition = $(10 + x)$ litres.The quantity of water remains constant at $0.5$ litres.According to the problem,the new percentage of water is $2 \%$.So,$2 \%$ of $(10 + x) = 0.5$.$0.02 	imes (10 + x) = 0.5$.$10 + x = 0.5 / 0.02$.$10 + x = 25$.$x = 25 - 10 = 15$ litres.Therefore,$15$ litres of pure milk should be added.

Milk contains $5 \%$ water. What quantity of pure milk should be added to $10$ litres of milk to reduce this to $2 \%$?

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