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Mathematics, 13.03.2022 07:30 kg4385649

3 taps x, y and z can fill a tank in 40 hours, 15 hours and 20 hours respectively. the three taps are turned on at 8.00a. m when the tank is empty for five hours then z is turned off. after two hours tap y is turned off. work out ;- the proportion of water in the tank after seven hours
the proportion of water in the tank after seven hours
the time the tank will be completely full

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