Question

Please help me you will get 25 points

Answer 1

Answer:

let B is opened for t hours, and the total system takes 14 hours to fill the tank.

so solving the equation,

(1/12-1/18)*t+(14-t)*1/12=1;

that gives t=3 hours

so, pipe B is closed at 9:00 am

Answer 2

Answer:

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