a burned house, Yohann, fire chief, arrives at the wheel of the tanker truck which contains 3000 liters of water. The firefighters connect 2 water lances to the tank and open them at the same time: - the large lance has a flow rate of 2000 liters per minute. -the small lance has a flow rate of 500 liters per minute. How long will it take for this truck's tank to be empty? Justice in your response.
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