how do i work out miles per hour

[stu9000]

just got back from a bike trip.
want to work out my average miles per hour.

Of course if im doing 60 miles in 60 mins
my average speed is 60 miles per hour.

BUT

If I did 87 miles in 40 mins that would be a faster average mph speed

what formula can i use to work out the average speed????

Oh, and yes I know im being a bit of a train spotter but ive just ridden 1164 miles of the best corners in wales and ireland and tonite, this is all im good for.

[stu9000]

Err..

If I did 87 miles in 40 mins

87 / 40 = 2.175 miles per minute

2.175 * 60 = 135.5 miles per hour...
surely not

[Alienist]

Sounds right to me Stu, but then I'm not exactly renowned for mathmatics ability?
Nice speed, that's like over 200kph. I hope there were no plods around mate to stop your fun

[VTRgirl]

Not bad Stu... Just a tad off. Right formula though. Divide by 40 to get miles per minute (2.175) then multiply by 60 to get miles per hour. Comes to 130.5, not 135.5 (probably just a typo there...). That's about 217km/h (I think...). Niiiiiice!