A can do a work in 13 days and B in 17 days. In how many days will they complete 75% of the work together? MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Time and Work Questions
Question #1
Report Error
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 C
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 #2
Report Error
A and B work together. A alone can complete the work in 24 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 = (1/24) / (1/24+1/34) ×100 = 58.62%.
A share = (1/24) / (1/24+1/34) ×100 = 58.62%.
This question belongs to:
Maths
Time and Work
Question #3
Report Error
A and B can complete a piece of work in 18 days and 24 days respectively. They worked together for 6 days and then A left. In how many days will B complete the remaining work?
Correct Answer: Option B
Explanation:
Total work = LCM(18, 24) = 72 units. Efficiency of A = 4, B = 3. Combined efficiency = 7. In 6 days, work done = 6 * 7 = 42 units. Remaining work = 72 - 42 = 30 units. Time taken by B to finish remaining work = 30 / 3 = 10 days.
Total work = LCM(18, 24) = 72 units. Efficiency of A = 4, B = 3. Combined efficiency = 7. In 6 days, work done = 6 * 7 = 42 units. Remaining work = 72 - 42 = 30 units. Time taken by B to finish remaining work = 30 / 3 = 10 days.
This question belongs to:
Maths
Time and Work
No comments yet. Be the first to start the discussion!