An alloy weighing 16 kg contains 6.4 iron, what is the mass of the alloy if it contains 2.4 kg of iron.

We find out what the mass of the alloy should be if it contains 2.4 kilograms of iron, provided that the alloy weighing 16 kilograms contains 6.4 kilograms of iron:

16 kg – 6.4 kg iron

x kg – 2.4 kg of iron

x = 2.4 × 16: 6.4;

x = 38.4: 6.4;

x = 6 (kg) – the mass of the alloy, which contains 2.4 kilograms of iron.

Thaws: the mass of the alloy is 6 kilograms.

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