Answer:
The number of cars to leave parking lot each min = 37
Explanation:
Numbers of cars in parking lot = 420
Time required to make sure that parking lot have only 50 cars = 10 minutes
So ,number of cars to leave parking lot = 420 - 50 = 370
∵ 10 min required to leave number of cars = 370
∴ For 1 min , number of cars to leave =
= 37
Hence The number of cars to leave parking lot each min = 37 Answer