Q:
The percentage of metals in a mine of zinc ore is 60%. Now the percentage of silver is 3/4% of metals and the rest is zinc. If the mass of ore extracted from the mine is 8000 kg, the mass (in kg) of zinc is
Answer & Explanation
Answer: B) 4764 kg
Explanation: Mass of zinc ore = 8000 kg
Mass of metal = 60% of 8000 = 4800 kg
Mass of silver in metal = 3/4 x 4800/100 = 36 kg
Mass of zinc = 4800 - 36 = 4764 kg.
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