360 people can ride the ferris wheel in 3 hours.
3 hours = 180 minutes ( 60 x 3 = 180 )
20 minutes = 40 people
40 minutes = 80 people
60 minutes = 120 people
80 minutes = 160 people
100 minutes = 200 people
120 minutes = 240 people
140 minutes = 280 people
160 minutes = 320 people
180 minutes = 360 people
Hope this helped! :-)