# Tank 9

The tank with volume V is filled with one pump for three hours and by the second pump for 5 hours. When both pumps run simultaneously, calculate:

a) how much of the total volume of the tank is filled in one hour

b) for how long is the tank full

a) how much of the total volume of the tank is filled in one hour

b) for how long is the tank full

### Correct answer:

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