Question

Two taps can fill a water tank in 10 hours and 15 hours, respectively. A third tap can empty the water tank in 8 hours. In how much time will the tank be full, if the third tap is opened 4 hours after the two taps were opened? ​

Answer 1

Step-by-step explanation:

(

10

1

+

8

1

−

15

1

)×t=1

120

12+15−8

×t=1

120

19

×t=1

t=

19

120

Answer 2

Answer:

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Step-by-step explanation:

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