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In a mixture of 100 litres of mango juice and water, the amount of water is 40 litres. How many litres of water should be added to make the ratio of juice to water 1:2?

1. 60 L
2. 70 L
3. 80 L
4. 90 L

Correct answer: 80 L

Solution

Initially, juice = 100 - 40 = 60 litres and water = 40 litres. For the ratio juice:water = 1:2, water must be 120 litres when juice is 60 litres. So, water to be added = 120 - 40 = 80 litres.

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