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Old 08-18-07, 11:03 AM   #1
aikigreg
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Bike math equation

Ok, for some reason I can't seem to figure out how to find speed given time and known distance. Obviously if you maintain 20 miles an hour, then you cover 10 miles in a half hour.

But what if you've done, say, 12.4 miles in 30.1 minutes? How do you find the speed?
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Old 08-18-07, 11:08 AM   #2
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12.4/30.1*60=25.31561462 Mph
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Old 08-18-07, 12:21 PM   #3
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rate * time = distance

Therefore, rate = distance/time, as Tom calculated for you.
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Old 08-18-07, 12:49 PM   #4
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12.4*2?

srsly mate....
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Old 08-18-07, 03:21 PM   #5
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Distance/time=speed
Your units have to match, so if you use 30.1 minutes it has to be converted into hours (the way Tom did) by dividing by 60 - 30.1 minutes = .501667 hours.

So much easier with a cyclometer installed...
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Old 08-18-07, 03:26 PM   #6
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Quote:
Originally Posted by aikigreg View Post
Ok, for some reason I can't seem to figure out how to find speed given time and known distance. Obviously if you maintain 20 miles an hour, then you cover 10 miles in a half hour.

But what if you've done, say, 12.4 miles in 30.1 minutes? How do you find the speed?
24.65 MPH, cant tell you how i came up with the answer becuase i figured it out in my head.
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Old 08-18-07, 04:07 PM   #7
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Forget all the above answers. Just play dumb and input your numbers into Foo everyday.

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