1.

1). 18 litres2). 38 litres3). 56 litres4). 84 litres

Answer»

Milk ? Water = 15 ? 7

AMOUNT = 66 litres

Amount of milk = 45 litres

Amount of water = 66 - 45 = 21 litres

Let x amount of milk be added, such that ratio becomes 3 ? 1

(45 + x) ? 21 = 3 ? 1

⇒ (45 + x) = 21(3)

⇒ x = 18 litres

∴ New amount = 66 + 18 = 84 litres



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