Question 21 : A does half as much work as B in three fourth of the time. If together they take 18 days to complete the work, how much time shall B take to do it ?
1. 32 days
2. 28 days
3. 30 days
4. 35 days
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Question 22 : A can do a certain work in 25 days which B alone can do in 20 days. A stared the work and was joined by B after 10 days. The work was completed in
1. 18 2/3 days
2. 16 2/3 days
3. 14 1/3 days
4. 15 1/3 days
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Question 23 : A is thrice as good a workman as B, and takes 10 days less to do a piece of work than B takes. B alone can do the whole work work in
1. 21 days
2. 15 days
3. 18 days
4. 24 days
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Question 24 : A, B and C can do a piece of work in 15 days, 10 days and 6 days respectively. How long will they take to do it, if all the three work together?
1. 7 days
2. 5 days
3. 3 days
4. 2.5 days
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Question 25 : A and B and C together can finish a piece of work in 4 days. A alone can do it in 12 days, and B in 18 days. Then, C alone can do it in
1. 8 days
2. 7 days
3. 9 days
4. 10 days
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Question 26 : A is twice as good workman as B, and together they complete a work in 15 days. In how many days can the work be complete by B alone?
1. 25 days
2. 45 days
3. 35 days
4. 40 days
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Question 27 : 12 men can complete a work in 18 days. Six days after they started working, 4 more men joined them. How many days will all of them together complete the remaining work?
1. 10 days
2. 8 days
3. 11 days
4. 9 days
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Question 28 : A,B and C are employed to do apiece of work for Rs.529. A and C are supposed to finish 19/23 of the work together. How much shall be paid to B?
1. Rs.92
2. Rs.112
3. Rs.98
4. Rs.86
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Question 29 : Worker A takes 8 hours to do a job. Worker B takes 10 hours to do the same job. How long it take both A & B, working together but independently, to do the same job?
1. 40/9 days
2. 40/7 days
3. 7.5 days
4. 8.5 days
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Question 30 : A is twice as good a workman as B and together they finish a piece of work in 18 days. In how many days will A alone finish the work?
1. 31 days
2. 25 days
3. 27 days
4. 29 days
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