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  1. The percentage of metals in a mine of lead ore is 60%. Now the percentage of silver is
    1
    		%
    2
    of metals and the rest is lead. If the mass of ore extracted from this mine is 8000 kg, the mass (in kg.) of lead is :
    1. 4763
    2. 4762
    3. 4764
    4. 4761
Correct Option: C

Required mass of lead

= 8000 ×
60
×1 -
3
100400

= 8000 ×
60
×
397
= 4764 kg.
5454


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