TIME AND WORK MCQ SET 7
1. A and B together can complete a certain work in 20 days whereas B and C together can complete it in 24 days . If A is twice as good a workman as C , then in what time will B alone do 40% of the same work ?
(a) 12 days
(b) 10 days
(c) 18 days
(d) 15 days
Answer: A
2. To do a certain work , A is 40% more efficient than B . Working together , then can do the same work in 15 days . A started the work and left after 15 days . B and C together completed the remaining work in next 10 days . C alone can do one third of the original work in :
(a) 36 days
(b) 21 days
(c) 30 days
(d) 24 days
Answer: D
3. A can complete 25% of a work in 15 days . He works for 15 days and then B alone finishes the remaining work in 30 days . In how many days will A and B working together finish 50% of the same work?
(a) 24
(b) 20
(c) 12
(d) 25
Answer: C
4. P can do one-fourth piece of some work in 18 days . She completed 37.5% of that work and left it . Q completed the remaining work in 40 days . Working together they will complete 17/48 part of the same work in :
(a) 10 days
(b) 8 days
(c) 12 days
(d) 6 days
Answer: C
5. P can finish a work in 18 days . When he had worked for 5 days , Q joined him . If both of them together completed the remaining work in 13/5 days , then in how many days can Q alone finish 2/3 of the same work?
(a) 5
(b) 4
(c) 2
(d) 3
Answer: D
6. A alone can do 2/5 of a work in 12 days . B is 25 percent more efficient than A . C alone can do the same work in 12 days less than B . D is 25 percent less efficient than C . If they all work together , then the work will be completed in how many days?
(a) 240/53
(b) 180/43
(c) 300/47
(d) 200/57
Answer: A
7. A and B can do a certain work in 18 days and 30 days , respectively . They work together for 5 days . C alone completes the remaining work in 15 days . A and C together can complete 5/6th part of the same work in:
(a) 6 days
(b) 8 days
(c) 9 days
(d) 5 days
ย Answer: C
8. A can complete a work in 60 days . B is 25% more efficient than A . They work together for 15 days . C alone completes the remaining work in 14 days . B and C together will complete 5/8th part of the original work in :
(a) 18 days
(b) 16 days
(c) 12 days
(d) 15 days
Answer: C
9. X and Y complete a certain work in 16 days and 24 days , respectively . They work together for 4 days . Z alone completes the remaining work in 10 1/2 days . Y and Z together can complete 7/8th part of the same work in :
(a) 10 days
(b) 12 days
(c) 8 days
(d) 9 days
Answer: D
10. A and B can do a certain work in 12 and 18 days , respectively . They work together for 5 days . The remaining work was completed by C alone in 27 1/2 days . What part of the same work can be completes by A , B and C together in 6 days?
(a) 9/10
(b) 29/30
(c) 14/15
(d) 5/6
Answer: A
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