Question
155 litres of a mixture contains 42% milk and rest
water. If ‘x’ litres of milk is added into the mixture then quantity of water in the final mixture becomes 31% of total quantity of mixture. Find the value of ‘x’.Solution
Quantity of milk in the initial mixture = 155 × 0.42 = 65.1 litres Quantity of water in the initial mixture = 155 – 65.1 = 89.9 litres Quantity of water is unchanged in the final mixture. So, Quantity of final mixture = (89.9/31) × 100 = 290 litres Quantity of milk in final mixture = 290 – 89.9 = 200.1 litres Value of ‘x’ = 200.1 – 65.1 = 135
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