Total number of passengers = 910
Solution:
Distance between each small line is 10 passengers.
Number of passengers travel at 7 am = 360
Number of passengers travel at 8 am = 280
Number of passengers travel at 9 am = 190
Number of passengers travel at 10 am = 80
Total number of passengers = 360 + 280 + 190 + 80
= 910
Total number of passengers = 910
