Two taps can fill a cistern in 6 min. and 7 min. respectively. If these taps are opened alternatively for a minute, in what time will the cistern be filled?
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Two taps A and B can fill a cistern in 28 min. and 42 min. respectively. Third tap C can empty it in 42 min. If all the three taps are opened, the time taken to fill the cistern is: |
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49 pumps can empty a reservoir in 6½ days, working 8 hours a day. If 196 pumps are used for 5 hours a day, then the same work will be completed in: |
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16 men complete one-fourth of a piece of work in 12 days. What is the additional number of men required to complete the work in 12 more days ? |
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A takes thrice as long to do a piece of work, as B takes. A and B together can do a piece of work in 7.5 days. A alone can do in: |
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A cistern can be filled by two pipes A and B in 10 and 15 hours respectively and is then emptied by a tap in 8 hours. If all the taps are opened, the cistern will be fill in: |
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A locomotive engine, without any wagons |
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If 33 untrained labourers can do a work in 15 days of 12 hr. each, how many trained labourers can do 50% more work in 11 days of 9 hr each ? (It may be assumed that it takes 2 trained labourers to do the work of 5 untrained labourers) |
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Which of the following fractions is less than 7/8 and greater than 1/3 ? |
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892.7 - 573.07 - 95.007 = ? |
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Which is the closest approximation to the product 0.3333 x 0.25 x 0.499 x 0.125 x 24 ? |
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