17 men can complete a work in 20 days. If 25 men work at the same rate, how many days are required? MCQ with Answer and Explanation
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Question #1
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19 men can complete a work in 29 days. If 23 men work at the same rate, in how many days will the work be completed?
Correct Answer: Option B
Explanation:
Total work = 19 × 29 = 551 man-days. Required days = 551/23 = 23.96 days.
Total work = 19 × 29 = 551 man-days. Required days = 551/23 = 23.96 days.
This question belongs to:
Maths
Time and Work
Question #2
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A and B can complete a piece of work in 24 days and 30 days respectively. Working together, what fraction of the work can they complete in 4 days?
Correct Answer: Option D
Explanation:
Total work = LCM(24, 30) = 120 units. Efficiency of A = 5, B = 4. Combined efficiency = 9 units/day. In 4 days, work completed = 4 * 9 = 36 units. Fraction of work completed = 36 / 120 = 3 / 10.
Total work = LCM(24, 30) = 120 units. Efficiency of A = 5, B = 4. Combined efficiency = 9 units/day. In 4 days, work completed = 4 * 9 = 36 units. Fraction of work completed = 36 / 120 = 3 / 10.
This question belongs to:
Maths
Time and Work
Question #3
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A can complete a work in 23 days and B can complete the same work in 28 days. If they work together, in how many days will the work be completed?
Correct Answer: Option C
Explanation:
Combined rate = 1/23 + 1/28. Time = 1 ÷ combined rate = 12.63 days.
Combined rate = 1/23 + 1/28. Time = 1 ÷ combined rate = 12.63 days.
This question belongs to:
Maths
Time and Work
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