# Could you solve this maths problem for me?

Update:
in a car with capacity 3000 litres. (there is already air in the car)

Gas cylinder is 9% nitrogen and 91% helium.

The gas cylinder size is 7.57m3 or 7570 litres.

The gas flow is 100 litres per minute.

how long would it take to achieve a 1% concentration of nitrogen in the car?

Gas cylinder is 9% nitrogen and 91% helium.

The gas cylinder size is 7.57m3 or 7570 litres.

The gas flow is 100 litres per minute.

how long would it take to achieve a 1% concentration of nitrogen in the car?

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