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71.A and B can do a job together in 7 days.
A is 1
times as efficient as B. The same job can be done by A
alone in :
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72.2 men and 3 boys can do a piece of work in
10 days while 3 men and 2 boys can do the same work in 8 days. In how many days
can 2 men and 1 boy do the work?
A. 20
B. 10
C. 25/2
D. 35/2
73.
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A and B together can do a piece of work in
30 days. A having worked for 16 days, B finishes the remaining work alone in
44 days. In how many days shall B finish the whole work alone?
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30 days
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40 days
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60 days
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70 days
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74.If 6 men and 8 boys can do a piece of work
in 10 days while 26 men and 48 boys can do the same in 2 days, the time taken
by 15 men and 20 boys in doing the same type of work will be:
A. 4 days
B. 5 days
C. 6 days
D. 7 days
View Answer With Explanation
75.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?
A. 6 days
B. 10 days
C. 15 days
D. 20 days
View Answer With Explanation
