Ram can complete a work in 18 days. Shyam is twice as efficient as Ram. If…
2023
Ram can complete a work in 18 days. Shyam is twice as efficient as Ram. If they start working together, how many days will they take to complete the work?
- A.
6 days
- B.
8 days
- C.
9 days
- D.
12 days
Attempted by 19 students.
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Correct answer: A
Ram completes the work in 18 days, so his daily rate is 1/18. Shyam is twice as efficient, completing the work in 9 days (rate of 1/9). Together, their combined rate is 1/18 + 1/9 = 3/18 or 1/6. Thus, they will complete the work in 6 days.