M and N working separately can complete a job in 6 and 12 hours respectively. If they work for an hour alternately M starting at 10:00 AM when will the job be done?
Correct answer D. 6:00 PM
Tip: press A, B, C or D to answer, and N for the next question.
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More Time and Work questions
See all20 men or 30 boys can do a certain job in 20 days. How long will it take 6 men and 15 boys to do the same job?
Correct answer A. 25 days
20 men can do a certain work in 60 days but after every five days five additional men join them. In how many days will work be done now?
Correct answer D. 34.5 days
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Two pipes A and B can fill a tank in 14 and 21 hrs respectively. If both pipes are opened together then after how many hours A should be closed so that tank is full in 7 hours.
Correct answer A. 28/5 hrs
A tank can be filled by tap A in 16 hrs and by tap B in 20 hrs. Both the taps are kept opened for 8 hrs and then A is closed. In how many more hours will the tank be completely filled?
Correct answer A. 2 hrs
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