1. If x can finish a job in 4 hours and y can finish the same job in 8 hours independently, then they together will finish the job in ?

140 minutes

160 minutes

120 minutes

150 minutes

Answer: 160 minutes

Explanation:


2. If 3 men or 4 women can plough a field in 43 days, how long will 7 men and 5 women take to plough it ?

10 days

11 days

9 days

12 days

Answer: 12 days

Explanation:


3. x does 1/4 of a job in 6 days. y completes rest of the job in 12 days. Then x and y could complete the job together in ?

9 days

9 and 3/5 days

8 and 1/8 days

7 and 1/3 days

Answer: 9 and 3/5 days

Explanation:


4. A and B can do a piece of work in 10 days. B and C can do it in 12 days. C and A in 15 days. In how many days will C finish it alone ?

24 days

30 days

40 days

60 days

Answer: 40 days

Explanation:


5. A and B can complete a piece of work in 8 days, B and C can do it in 12 days, C and A can do it in 8 days. A, B and C together can complete it in ?

4 days

5 days

6 days

7 days

Answer: 6 days

Explanation:


6. A, B and C together can complete a piece of work in 30 minutes. A and B together can complete the same work in 50 minutes. C alone can complete the work in ?

60 minutes

75 minutes

80 minutes

150 minutes

Answer: 75 minutes

Explanation:


7. A and B can do a piece of work in 36 days, B and C can do it in 60 days, A and C can do it in 45 days. C alone can do it in ?

90 days

180 days

120 days

150 days

Answer: 180 days

Explanation:


8. A can do a work in 6 days and B in 9 days. How many days will both take together to complete the work ?

7.5 days

5.4 days

3.6 days

3 days

Answer: 3.6 days

Explanation:


9. A particular job can be completed by a team of 10 men in 12 days. The same job can be completed by a team of 10 women in 6 days. How many days are needed to complete the job if the two teams work together ?

4 days

6 days

9 days

18 days

Answer: 4 days

Explanation:


10. A and B together can complete a piece of work in 72 days, B and C together can complete it in 120 days, and A and C together in 90 days. In what time can A alone complete the work ?

80 days

100 days

120 days

150 days

Answer: 120 days

Explanation: