The rate of the vacuum's airflow in L/s, given the data is 99.11 L/s
We'll begin by converting 210 ft³/min to L/min. This can be obtained as follow:
1 ft³/min = 28.3168 L/min
Therefore,
210 ft³/min = 210 × 28.3168
210 ft³/min = 5946.528 L/min
Thus, 210 ft³/min is equivalent to 5946.528 L/min
We can convert 5946.528 L/min to L/s as illustrated below:
60 L/min = 1 L/s
Therefore,
5946.528 L/min = 5946.528 / 60
5946.528 L/min = 99.11 L/s
Thus,
210 ft³/min = 99.11 L/s
The rate of the vacuum's airflow in L/s is 99.11 L/s
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