An alloy of zinc and tin contains 37% zi...

An alloy of zinc and tin contains 37% zinc by weight. Find the weight of zinc which must be added to 400 kg of this alloy if the final percentage of zinc is to be 70.

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An alloy of zinc and tin contains 37% zinc by weight. Find the weight of zinc which must be added to 400 kg of this alloy if the final percentage of zinc is to be 70.

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