Arithmetichard · Past Paper
A mixture of 20kg of salt and water contains 10% salt. How much water must be added to make it a 5% salt mixture?
A10 kg
B20 kg
C30 kg
D40 kg
✓ Correct Answer: B — 20 kg
Salt = 2kg. New total weight x where 2/x = 0.05 => x = 40kg. Added water = 40 - 20 = 20kg.
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