7 Indian and 4 American finish a job in 6 days 7 African and 3 American finish the same job in 8 day...........

Quantitative Aptitude ( CCS) Time and work

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

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Explanation:

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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