Two taps fill a water reservoir in 6 and 8 hours respectively. Third tap can empty the completely filled water reservoir in 15 hours. How long would it take to fill the empty tank, if all of them are opened simultaneously?
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read an artide about AFROZ SHAH's campaign that shows selfless leadership and collective effort. what measures did AFROZ SHAH take for conversation of the environment.
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read an artide about AFROZ SHAH's campaign that shows selfless leadership and collective effort. what measures did AFROZ SHAH take for conversation of the environment.
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