The wheel has ten seats and each seat can fit one couple. each minute a seat passes by the entrance exit stage. the wheel starts functioning at 8pm for half an hour-how many couples took a ride

The first thing you should know is that the wheel works for half an hour.
 Half an hour = 30 minutes.
 We can make the following rule of three:
 1 min ---> 10
 30 min ---> x
 Clearing x
 x = ((30) / (1)) * (10) = 300
 answer
 300 couples took a ride