A is thrice as efficient as B. Working together, they can complete a piece of work in 18 days. In how many days can A alone complete the work? MCQ with Answer and Explanation
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Question #1
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A can complete a work in 12 days and B in 40 days. If both work together, in how many days will the work be completed?
Correct Answer: Option A
Explanation:
Combined rate = 1/12 + 1/40. Time = 9.23 days.
Combined rate = 1/12 + 1/40. Time = 9.23 days.
This question belongs to:
Maths
Time and Work
Question #2
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A can complete a work in 17 days and B in 21 days. If they work together, the work will be completed in:
Correct Answer: Option C
Explanation:
Combined rate = 1/17 + 1/21. Required time = 9.39 days.
Combined rate = 1/17 + 1/21. Required time = 9.39 days.
This question belongs to:
Maths
Time and Work
Question #3
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A can complete a work in 16 days and B in 32 days. After working together for 5 days, what percentage of work remains?
Correct Answer: Option C
Explanation:
Remaining work = (1 - 5*(1/16+1/32))×100 = 53.12%.
Remaining work = (1 - 5*(1/16+1/32))×100 = 53.12%.
This question belongs to:
Maths
Time and Work
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