SOLUTION: if you drive 20 mile and it takes you 30miutes your average speed is?

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Question 572148: if you drive 20 mile and it takes you 30miutes your average speed is?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
30 min = 1/2 hour

d = rt

20 = r(1/2)

20*2 = r

40 = r

r = 40


So the average speed is 40 mph