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a cowboy at a dude ranch fills a horse trough that is 1.5m long, 60cm wide, and 40cm deep. He uses a 2.0cm diameter hose from which water emerges at 1.5m/s. How long does it take him to fill the trough?

(150cmx60cmx40cm)/((pi)(2cm)^2(150cm/s))=191 sec (which is not equivalent to the 13 min, answer in the back of the book)

  • physics -

    Isnt the area given by PI r^2, not diameter squared?

  • physics -

    yes, thanks!

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