E-PolyLearning

6. 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
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Answer: (a).4 days

7. A can do a piece of work in 4 hours; B and C together can do it in 3 hours, while A and C together can do it in 2 hours. How long will B alone take to do it?
a. 8 hours
b. 10 hours
c. 12 hours
d. 24 hours
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Answer: (c).12 hours

8. A can do a certain work in the same time in which B and C together can do it. If A and B together could do it in 10 days and C alone in 50 days, then B alone could do it in:
a. 15 days
b. 20 days
c. 25 days
d. 30 days
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Answer: (c).25 days

9. A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?
a. 23 days
b. 37 days
c. 37(1/2) days
d. 40 days
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Answer: (c).37(1/2) days

10. A machine P can print one lakh books in 8 hours, machine Q can print the same number of books in 10 hours while machine R can print them in 12 hours. All the machines are started at 9 A.M. while machine P is closed at 11 A.M. and the remaining two machines complete work. Approximately at what time will the work (to print one lakh books) be finished ?
a. 11:30 A.M.
b. 12 noon
c. 12:30 P.M.
d. 1:00 P.M.
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Answer: (d).1:00 P.M.

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