23 men can complete a work in 30 days. If 28 men work at the same rate, the work will be completed in: MCQ with Answer and Explanation
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Question #1
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A and B work together. A alone can complete the work in 18 days and B alone in 34 days. What percentage of the total daily work is contributed by A?
Correct Answer: Option B
Explanation:
A share = (1/18) / (1/18+1/34) ×100 = 65.38%.
A share = (1/18) / (1/18+1/34) ×100 = 65.38%.
This question belongs to:
Maths
Time and Work
Question #2
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A can complete a work in 31 days and B in 31 days. If both work together, in how many days will the work be completed?
Correct Answer: Option B
Explanation:
Combined rate = 1/31 + 1/31. Time = 15.5 days.
Combined rate = 1/31 + 1/31. Time = 15.5 days.
This question belongs to:
Maths
Time and Work
Question #3
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15 men can complete a work in 25 days. If 19 men work at the same rate, in how many days will the work be completed?
Correct Answer: Option C
Explanation:
Total work = 15 × 25 = 375 man-days. Required days = 375/19 = 19.74 days.
Total work = 15 × 25 = 375 man-days. Required days = 375/19 = 19.74 days.
This question belongs to:
Maths
Time and Work
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