Question
Quantity of water in a 450 litres mixture (alcohol +
water) is 30 litres less than the quantity of alcohol in it. Find the quantity of water to be mixed so that the quantity of alcohol in the mixture becomes 40% of the whole mixture.Solution
Quantity of water in the mixture = (450 – 30)/2 = 210 litres So, Quantity of alcohol in the mixture = (450 – 210) = 240 litres Total quantity of the mixture = 240 x (100/40) = 600 litres Therefore, quantity of water to be mixed = 600 – 450 = 150 litres
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121/? = ?/144 6% of 520 + 5% of 620 = ?
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