A can complete a work in 10 days and B in 30 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 23 days and B can complete the same work in 33 days. If they work together, in how many days will the work be completed?
Correct Answer: Option A
Explanation:
Combined rate = 1/23 + 1/33. Time = 1 ÷ combined rate = 13.55 days.
Combined rate = 1/23 + 1/33. Time = 1 ÷ combined rate = 13.55 days.
This question belongs to:
Maths
Time and Work
Question #2
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16 men can complete a work in 18 days. If 21 men work at the same rate, the work will be completed in:
Correct Answer: Option C
Explanation:
Total work = 288 man-days. Time = 288/21 = 13.71 days.
Total work = 288 man-days. Time = 288/21 = 13.71 days.
This question belongs to:
Maths
Time and Work
Question #3
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A and B work together. A alone can complete the work in 30 days and B alone in 26 days. What percentage of the total daily work is contributed by A?
Correct Answer: Option C
Explanation:
A share = (1/30) / (1/30+1/26) ×100 = 46.43%.
A share = (1/30) / (1/30+1/26) ×100 = 46.43%.
This question belongs to:
Maths
Time and Work
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