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A piece of alloy weighs 8 kg. It contains tin and copper and their weights are in the ratio of 3 ∶ 1. If the amount of tin is reduced by half, what is the new weight of the piece?1). 7 kg2). 6 kg3). 5 kg4). 4 kg |
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Answer» Let the weight of TIN and copper be 3X kg and 1x kg respectively. 3x + 1x = 8 ⇒ x = 2 ∴ Weight of tin = 6 kg and weight of copper = 2 kg New quantity of tin = 3 kg ∴ New weight of the PIECE = 3 kg + 2 kg = 5 kg |
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