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.Management Sciences
Category: Basic Maths Mcqs
A and B together take 6 days to complete a task. B and C together take 12 days to complete the same task. A and C together take 8 days to complete it. If A, B and C are working together, how long does it take for them to complete the task?
A. 4(2/3) days
B. 4 days
C. 5(1/3) days
D. 1(1/3) days
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A man can row upstream at 25 kmph and downstream at 35 kmph, and then find the speed of the man in still water?
A. 60 kmph
B. 10 kmph
C. 30 kmph
D. 5 kmph
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A can do (1/3) of a work in 5 days and B can do (2/5) of the work in 10 days. In how many days both A and B together can do the work ?
A. 75/8 days
B. 44/6 days
C. 48/5 days
D. None of these
A cistern has two taps which fill it in 12 min. and 15 min.respectively There is one outlet pipe in the cistern. When all the taps & pipe are opened, the empty cistern is full in 20 min. How long will the waste pipe (outlet) take to empty the full cistern ?
A. 10 min
B. 20 min
C. 30 min
D. 40 min
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