1.

1). 96 litres2). 84 litres3). 68 litres4). 74 litres

Answer»

Juice ? MILK ? Water = 2 ? 9 ? 7

Amount = 108 litres

Amount of juice = $(\frac{2}{{18}} \times 108 = 12)$ litres

Amount of milk = $(\frac{9}{{18}} \times 108 = 54)$ litres

Amount of water = $(\frac{7}{{18}}\; \times 108 = 42)$ litres

Let x be amount of milk added and y be amount of water, such that ratio of mixture BECOMES 1 ? 7 ? 6

12 ? (54 + x) ? (42 + y) = 1 ? 7 ? 6

Now, 12 ? (54 + x) = 1 ? 7

∴ (12)(7) = 54 + x

∴ x = 30 litres

Also, 12 ? (42 + y) = 1 ? 6

∴ (12)(6) = 42 + y

∴ y = 30 litres

Amount of water = 42 + 30 = 72 litres

Amount of juice and water = 12 + 72 = 84 litres



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