SOLUTION: How fast is a car going if it goes a mile in 27 seconds

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Question 581952: How fast is a car going if it goes a mile in 27 seconds
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
60 seconds = 1 min

1 second = 1/60 min

27 seconds = 27/60 min

27 seconds = 9/20 min

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60 min = 1 hr

1 min = 1/60 hr

9/20 min = (9/20)*(1/60) hr

9/20 min = 9/1200 hr

9/20 min = 3/400 hr


So this means that 27 seconds = 3/400 hours

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d = rt

1 = r(3/400)

1*400 = 3r

400 = 3r

400/3 = r

r = 400/3

r = 133.33 mph

So the car is going roughly 133.33 mph