Correct Answer: 6
Explanation:
Efficiency of (A + B) = 12.5%
Efficiency of (B + C) = 8.33%
Efficiency of (C + A) = 12.5%
∴ Efficiency of [(A + B) + (B + C) + (C + A)] = 33.33%
∴ Efficiency of (A + B + C) = 16.66%
∴ No. of days Required by A, B and C together = 100/16.66 = 6 days
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