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? MCQ with Answer and Explanation
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Question #1
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23 men can complete a work in 26 days. If 31 men work at the same rate, how many days are required?
Correct Answer: Option B
Explanation:
Total work = 598 man-days. Days = 19.29.
Total work = 598 man-days. Days = 19.29.
This question belongs to:
Maths
Time and Work
Question #2
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A is twice as fast as B. If A and B together can complete a piece of work in 8 days, in how many days can A alone complete it?
Correct Answer: Option C
Explanation:
Let efficiency of B = 1, then efficiency of A = 2. Combined efficiency = 3 units/day. Total work = 8 * 3 = 24 units. Time taken by A alone = 24 / 2 = 12 days.
Let efficiency of B = 1, then efficiency of A = 2. Combined efficiency = 3 units/day. Total work = 8 * 3 = 24 units. Time taken by A alone = 24 / 2 = 12 days.
This question belongs to:
Maths
Time and Work
Question #3
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A is twice as efficient as B. If they complete a piece of work together in 14 days, how many days will A alone take to finish it?
Correct Answer: Option C
Explanation:
Let B's efficiency be 1 unit/day, so A's efficiency is 2 units/day. Combined efficiency = 3 units/day. Total work = 3 * 14 = 42 units. Time taken by A alone = 42 / 2 = 21 days.
Let B's efficiency be 1 unit/day, so A's efficiency is 2 units/day. Combined efficiency = 3 units/day. Total work = 3 * 14 = 42 units. Time taken by A alone = 42 / 2 = 21 days.
This question belongs to:
Maths
Time and Work
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