1.

1). 1/2 kg2). 3/8 kg3). 23/56 kg4). 25/56 kg

Answer»

Let the AMOUNTS of silver, gold and platinum in the first ALLOY be 4x, 7x and 3x.

Total amount used = 14x.

Let the amounts of iron, gold and platinum in the second alloy be 8y, 9y and 11y.

Total amount used = 28Y

Since equal amounts are mixed, 14x = 28y ⇒ x = 2y

Total alloy = 28y + 28y = 56y = 1 KG. ⇒ y = 1/56 Kg

Amount of gold = 7x + 9y = 14y + 9y = 23y = 23/56 Kg.



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