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Question : A and B together can complete a given work in 10 days. C can complete the same work alone in 15 days. In how many days can they complete the work, if all three work together?

Option 1: 8 days

Option 2: 5 days

Option 3: 6 days

Option 4: 10 days


Team Careers360 7th Jan, 2024
Answer (1)
Team Careers360 20th Jan, 2024

Correct Answer: 6 days


Solution : 1 day's work of A and B = $\frac{1}{10}$
1 day's work of C = $\frac{1}{15}$
1 day's work of A, B and C together = $\frac{1}{10}+\frac{1}{15}
= \frac{3+2}{30}
= \frac{1}{6}$
Thus, the work is completed in 6 days.
Hence, the correct answer is 6 days.

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