A can complete a work in 20 days and B in 14 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 10 days and B in 19 days. If they work together, the work will be completed in:
Correct Answer: Option C
Explanation:
Combined rate = 1/10 + 1/19. Required time = 6.55 days.
Combined rate = 1/10 + 1/19. Required time = 6.55 days.
This question belongs to:
Maths
Time and Work
Question #2
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A can complete a work in 13 days and B in 28 days. If both work together, in how many days will the work be completed?
Correct Answer: Option B
Explanation:
Combined rate = 1/13 + 1/28. Time = 8.88 days.
Combined rate = 1/13 + 1/28. Time = 8.88 days.
This question belongs to:
Maths
Time and Work
Question #3
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A is 30% more efficient than B. How much time will they take together to complete a job which A alone can finish in 23 days?
Correct Answer: Option C
Explanation:
Let efficiency of B = 10, then efficiency of A = 13. Total work = Efficiency of A * Time taken by A = 13 * 23 = 299 units. Combined efficiency of A and B = 13 + 10 = 23. Time taken together = 299 / 23 = 13 days.
Let efficiency of B = 10, then efficiency of A = 13. Total work = Efficiency of A * Time taken by A = 13 * 23 = 299 units. Combined efficiency of A and B = 13 + 10 = 23. Time taken together = 299 / 23 = 13 days.
This question belongs to:
Maths
Time and Work
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