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July 29, 2015

Homework Help: physics

Posted by amal on Wednesday, November 30, 2011 at 2:44pm.

A fire hose can fill a certain tank with water during 1 hour. A 2nd fire hose can fill the same tank in half hour. A 3rd fire hose can fill the same tank in quarter hour.
find the time necessary to fill the same tank by the 3 fire hoses together

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