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7 Indian and 4 American finish a job in 6 days. 7 African and 3 American finish the same job in 8 days. The efficiency of each person of a particular nationality is same but different from others. One Indian One American and One African will complete the work in:
10 days
12 days
36 days
24 days
Explanation: 7I + 4Am = 1/6 7Af + 4Am = 1/8 7I + 7Af + 7Am = 7/24 1I + 1Af + 1Am = 1/24 One Indian One American and One African will complete the work in – 24 days.
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