TIME AND WORK MCQ SET 2
1. A , B and C can do a work in 12 , 15 and 20 days respectively . in how many days will they complete the same work together ?
(a) 10 days
(b) 5 days
(c) 6 days
(d) 7 days
Answer: B
2. A tyre has 3 punctures . The first puncture alone would have made the tyre flat in 9 minutes , the second alone would have done it in 18 minutes , the third place would have done it in 6 minutes . If the air leaks out at a constant rate , then how long (in minutes) does it take for all punctures together to make it flat ?
(a) 6
(b) 3
(c) 2
(d) 1
Answer: B
3. A , B and C can do a work in 4 , 20 and 60 days respectively . Working together , they can complete the one third work in how many days ?
(a) 20/19
(b) 20/9
(c) 12/19
(d) 17/19
Answer: A
4. Working together A , B and C can complete a piece of work in 3 days . A completes the same work in 24 days and B completes it in 6 days . How many days will C alone take to complete the same work?
(a) 6
(b) 12
(c) 8
(d) 18
Answer: C
5. X can do a work alone 15 days . Y can do the same work in 30 days . X , Y and Z together can do that work in 9 days . In how many days Z alone can do that work ?
(a) 120
(b) 90
(c) 45
(d) 60
Answer: B
6. A can complete one – third of a work in 5 days and B can do 2/5th of the work in 10 days . They work together for 6 days . The remaining work is completed by C in 18 days . C alone will do the same work in ?
(a) 50
(b) 30
(c) 25
(d) 45
Answer: A
7. A can do 1/3 of a work in 15 days , B can do 3/4 of the same work in 18 days and C can do the same work in 36 days . B and C work together for 8 days . In how many days days will A alone complete the remaining work ?
(a) 24 days
(b) 18 days
(c) 20 days
(d) 16 days
ย Answer: C
8. A and B can together complete a piece of work in 18 days . B and C can together complete the same work in 24 days and A and C can together complete it in 36 days . In how many days can A , B and C, working together , complete this piece of work ?
(a) 19
(b) 16
(c) 20
(d) 14
Answer: B
9. Raghav and Aditya can complete a work in 3 days . Aditya and Ishaan can complete the same work inย days . Ishaan and Raghav can complete it in 6 days . How many days will it take for Raghav , Aditya and Ishaan , combined together , to complete the same amount of work ?
(a) 2 4/5
(b) 3 2/3
(c) 3 3/4
(d) 2 2/3
Answer: D
10. A work is done by P & Q , Q & R , and R & P in 12 , 15 , and 20 days , respectively . How many days will P alone take to complete the work?
(a) 35 days
(b) 25 days
(c) 40 days
(d) 30 days
Answer: D
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