1) A can do a piece of work in 10 days and B can do it in 15 days and C can do it 20 days. They started the work together and A leaves after 2 days and B leaves after 4 days from the beginning. How long will work lost?

8 2/3 days

9 2/3 days

10 days

10 2/3 days

2) A and B complete a work in 6 days. A alone can do it in 10 days. If both together can do the work in how many days?

4 days

3.75 days

5 days

6 days

3) A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in ------- days?

21 ½ days

23 ½ days

22 ½ days

12 ½ days

4) If A, B and C together can finish a piece of work in 4 days. A alone in 12 days and B in 18 days, then C alone can do it in?

21 days

9 days

21 days

12 days

5) A can do a piece of work in 40 days; B can do the same in 30 days. A started alone but left the work after 10 days, then B worked at it for 10 days. C finished the remaining work in 10 days. C alone can do the whole work in?

17 1/2 days

44 days

24 days

30 days

6) Anil can do a work in 15 days while Sunil can do it in 25 days. How long will they take if both work together?

8 4/9 days

6 3/8 days

3 4/9 days

9 3/8 days

7) If 12 men do a work in 80 days, in how many days will 16 men do it?

30

50

60

40

8) A, B and C can do a work in 6, 8 and 12 days respectively doing the work together and get a payment of Rs.1800. What is B’s share?

Rs.600

Rs.450

Rs.300

Rs.500

9) A and B can do a piece of work in 6 2/3 days and 5 days respectively. They work together for 2 days and then A leaves. In how many days after that B will complete the work alone.

1 ½ days

2 days

3 ½ days

3 days

10) A and B together can do a work in 6 days. If A alone can do it in 15 days. In how many days can B alone do it?

12

16

10

15

11) A and B can do a piece of work in 7 days. With the help of C they finish the work in 5 days. C alone can do that piece of work in?

32 days

10 days

30 days

1 day

12) A can finish a piece of work in 5 days. B can do it in 10 days. They work together for two days and then A goes away. In how many days will B finish the work?

6 days

4 days

5 days

8 days

13) A is twice as good a work man as B and together they finish the work in 14 days. In how many days A alone can finish the work?

23

22

21

20

14) A can do a piece of work in 15 days and B in 20 days. They began the work together but 5 days before the completion of the work, A leaves. The work was completed in?

10 days

15 days

8 days

11 3/7 days

15) A and B together can do a piece of work in 8 days. If A alone can do the same work in 12 days, then B alone can do the same work in?

20 days

28 days

16 days

24 days

16) A is thrice as efficient as B and is, therefore, able to finish a piece of work 10 days earlier than B. In how many days A and B will finish it together?

3 1/2 days

3 4/5 days

5 days

3 days

17) A and B can do a piece of work in 12 days and 16 days respectively. Both work for 3 days and then A goes away. Find how long will B take to complete the remaining work?

12 days

9 days

15 days

10 days

18) A can do a piece of work in 4 days. B can do it in 5 days. With the assistance of C they completed the work in 2 days. Find in how many days can C alone do it?

4 days

5 days

10 days

20 days

19) After working for 6 days, Ashok finds that only 1/3 rd of the work has been done. He employs Ravi who is 60% as efficient as Ashok. How many days more would Ravi take to complete the work?

10 days

12 days

20 days

19 days

20) A, B and C can do a piece of work in 24, 30 and 40 days respectively. They start the work together but C leaves 4 days before the completion of the work. In how many days is the work done?

11 days

13 days

15 days

14 days

21) Ravi can do a piece of work in 30 days while Prakash can do it in 40 days. In how many days will they finish it together?

17 1/7 days

23 2/7 days

16 4/11 days

27 1/7 days

22) A can do a piece of work in 10 days. He works at it for 4 days and then B finishes it in 9 days. In how many days can A and B together finish the work?

6 days

8 ½ days

8 days

7 ½ days

23) A and B can do a piece of work in 3 days, B and C in 4 days, C and A in 6 days. How long will C take to do it?

18 days

24 days

30 days

18 days

24) A can do a piece of work in 12 days. When he had worked for 2 days B joins him. If the complete work was finished in 8 days. In how many days B alone can finish the work?

24 days

12 days

10 days

18 days

25) A can do a piece of work in 30 days. He works at it for 5 days and then B finishes it in 20 days. In what time can A and B together it?

13 1/3 days

16 2/3 days

16 1/2 days

17 1/3 days

26) 9 men and 12 boys finish a job in 12 days, 12 men and 12 boys finish it in 10 days. 10 men and 10 boys shall finish it in how many days?

12

14

10

8

27) A and B can finish a work in 16 days while A alone can do the same work in 24 days. In how many days B alone will complete the work?

36

48

58

56

28) 5 men and 12 boys finish a piece of work in 4 days, 7 men and 6 boys do it in 5 days. The ratio between the efficiencies of a man and boy is?

1:2

2:3

6:5

2:1

29) A, B and C can do a piece of work in 7 days, 14 days and 28 days respectively. How long will they taken, if all the three work together?

4 days

3 days

6 days

5 days

30) A work which could be finished in 9 days was finished 3 days earlier after 10 more men joined. The number of men employed was?

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