ANY ONE WHO IS GOOD AT PHYSICS OR MATHS!!!! please help i beg anyone!!?

Posted on 2016-03-10 18:46:00 in Physics by ALBERT

ANY ONE WHO IS GOOD AT PHYSICS OR MATHS!!!! please help i beg anyone!! Okay i have this science assignment and one of the questions is: 

You are to calculate the AVERAGE SPEED of of the following ride by timing ONE LAP of the ride with a stopwatch. The rides’ DATA are as follows- go on ride more than 1 time to get average 
Ferris Wheel: Radius = 16.85m 

also here are my time recordings- Attempts: 
Lap 1: 39.12 seconds 
Lap 2: 40.12 seconds 
Lap 3: 38.90 seconds 
=118.14 seconds (1 minute and 58.14 seconds) 
=118.14/3 
Average=39.38 second 

i just have no idea how to work out rides with a radius!!! please help, it will honestly be appreciated SO SO SO MUCH

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