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Aptitude > Math > Time and work

1 A takes twice as much time as B or thrice as much time as C to finish a piece of work. Working together, they can finish the work in 2 days. B can do the work alone in:
 
14 days
26 days
38 days
412 days
 
Answer: Option2
2 Babu and Asha can do a job together in 7 days. Asha is 7/4 timesas efficient as Babu. The same job can be done by Asha alone in
 
122 days
221 days
311 days
4 9 days
 
Answer: Option3
3 A is thrice as good as workman as B and therefore is able to finish a job in 60 days less than B. Working together, they can do it in:
 
120 days
22212days
325
430
 
Answer: Option2
4 Ravi and Kumar are working on an assignment. Ravi takes 6 hours to type 32 pages on a computer, while Kumar takes 5 hours to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?
 
17 hours 30 minutes
28 hours
38 hours 15 minutes
48 hours 25 minutes
 
Answer: Option3
5 X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?
 
16 days
210 days
35 days
420 days
 
Answer: Option2
6 A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:
 
1915days
2925days
3935days
410
 
Answer: Option3
7 If 80 persons can finish a work within 16 days by working 6 hours a day, the number of hours a day, should 64 persons work to finish that very job with-in 15 days is:
 
1 5 hrs.
27 hrs.
38 hrs.
4 6 hrs.
 
Answer: Option3
8 5 men and 2 women working together can do four times as much work per hour as a man and a woman together. The work done by a man and a woman should be in ratio:
 
1 1:2
22:1
3 1:3
44:1
 
Answer: Option2
9 5 persons can prepare an admission list in 8 days working 7 hours a day. If 2 persons join hem so as to complete the work in 4 days they need to work per day for
 
110 hours
29 hours
312 hours
4 8 hours
 
Answer: Option1
10 If 10 men or 20 boys can make 260 mats in 20 days, then how many mats will be made by 8 men and 4 boys in 20 days?
 
1260
2240
3 280
452
 
Answer: Option1
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