A can complete a work in 19 days and B in 19 days. If they work together, the work will be completed in: MCQ with Answer and Explanation
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Question #1
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A can complete a work in 19 days and B in 30 days. If they work together, the work will be completed in:
Correct Answer: Option C
Explanation:
Combined rate = 1/19 + 1/30. Required time = 11.63 days.
Combined rate = 1/19 + 1/30. Required time = 11.63 days.
This question belongs to:
Maths
Time and Work
Question #2
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A and B together can do a piece of work in 6 days. If A alone can do it in 18 days, in how many days can B alone complete the work?
Correct Answer: Option B
Explanation:
Combined 1-day work = 1/6. A's 1-day work = 1/18. B's 1-day work = 1/6 - 1/18 = 2/18 = 1/9. Therefore, B alone can complete the work in 9 days.
Combined 1-day work = 1/6. A's 1-day work = 1/18. B's 1-day work = 1/6 - 1/18 = 2/18 = 1/9. Therefore, B alone can complete the work in 9 days.
This question belongs to:
Maths
Time and Work
Question #3
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A can complete a work in 24 days and B in 23 days. If both work together, in how many days will the work be completed?
Correct Answer: Option C
Explanation:
Combined rate = 1/24 + 1/23. Time = 11.74 days.
Combined rate = 1/24 + 1/23. Time = 11.74 days.
This question belongs to:
Maths
Time and Work
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