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Work Problems

Work Problems. 1. Pump A can unload the LUNAR PETRO in 30 hours and Pump B can unload it in 24 hours. Because of an approaching storm, both pumps are used. How long did they take to empty the ship?.

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Work Problems

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  1. Work Problems

  2. 1. Pump A can unload the LUNAR PETRO in 30 hours and Pump B can unload it in 24 hours. Because of an approaching storm, both pumps are used. How long did they take to empty the ship?

  3. 2. An old conveyor belt takes 21 hours to move one day’s coal output from the mine to a rail line. A new belt can do it in 15 hours. How long does it take when both are used at the same time?

  4. 3. Crane A can unload the container ship in 10 hours, and Crane B can unload it in 14 hours. Crane A started to unload the ship at noon and was joined by Crane B at 2 PM. At what time was the unloading job of the ship completed?

  5. 4. The county’s new asphalt paving machine can surface 1 km of highway in 10 hours. A much older machine can surface 1 km in 18 hours. How long will it take them to surface 21 km of highway if they start at opposite ends and work day and night?

  6. 5. Pipes A and B can fill a storage tank in 8 hours and 12 hours respectively. With the tank empty, Pipe A was turned on at noon, and then Pipe B was turned on at 1:30 PM. At what time was the tank full?

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