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HELP try and work this one out!

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HELP try and work this one out!

Old 04-15-2006, 03:12 PM
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Default HELP try and work this one out!

I timed my car over ten metres and it took 0.7 seconds how fast was it going in KPH or MPH?
Old 04-15-2006, 03:46 PM
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Default RE: HELP try and work this one out!

you don't even need a calculator for this one. 0.7 seconds for 10 meters = .07 seconds for 1 meter. 1000 meters in a kilometer so 1000 x .07 = 70 kph

70/1.61 = 43.5 mph
Old 04-20-2006, 08:18 PM
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Default RE: HELP try and work this one out!

close but not quite. i agree with .07 seconds for a meter and 1000 meters in a kilometer, but from there.....?

.7 seconds / 3600 seconds per hour = .00019 hours

in .00019 hours, the car traveled 10 meters or .01 kilometers

so that means the car traveled .01 kilometers per .00019 hours, or 52.63 kilometers per 1 hour

your conversion from kph to mph is correct, so this equals 32.7 mph

maybe you should have used a calculator
Old 04-21-2006, 04:43 AM
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Default RE: HELP try and work this one out!

D
ST

Distance = speed x time
Speed = Distance / time
Time = Distance / speed

I'm with sb7979

And GaGeeBees, for the birds your avatar rules

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