 # Aptitude - Aptitude-Time And Works

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Water flows into a reservoir which is 200 m long and 150 m wide, through a pipe of cross-section (0.3m X 0.2m) at 20kmph. In what time will the water level be 8?

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Volume of water collected in the tank in 1 hour ⇒ 0.3×0.2×20×1000=1200 m cubic If after t hours, the water is at height of 8m, 1200t=200×150×8 ⇒ t = 200 Hours.

The rates of working of A and B are in the ratio 5 : 6 The number of days taken by them to finish the work are in the ratio  ?

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39 persons can repair a road in 12 days, working 5 hours a day. In how
many days will 30 persons, working 6 hours a day, complete the work?

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A certain number of men complete a piece of work in 60 days. If there were 8 men more, the work could be finished in 10 days less. Hoe maany men were originally there ?

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Two pipes can fill a tank in 20 and 24 minutes respectively and a waste
pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank in gallons is ?

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