# Two lap race

borissa
Posers and Puzzles 23 Mar '05 21:09
1. 23 Mar '05 21:09
There is a circular track 1 mile long. A man must complete the track twice (thus doing 2 miles). Assuming he travels at 30mph on the first lap, what speed must he average on the second lap to finish with an overall average speed of 60 mph?

Sorry if this one's been done already!
2. 23 Mar '05 21:26
Well to average 60 mph he must complete two miles in two minutes.

So if he travels at 30 mph for the first lap this will take 2 minutes in itself so........... that leaves no time at all to complete the second lap.
Enter Einstein or a famous footballer with nice Porche.
3. PBE6
Bananarama
23 Mar '05 21:49
Can't win, don't try!
4. Alcra
Lazy Sod
24 Mar '05 07:58
Originally posted by borissa
There is a circular track 1 mile long. A man must complete the track twice (thus doing 2 miles). Assuming he travels at 30mph on the first lap, what speed must he average on the second lap to finish with an overall average speed of 60 mph?

Sorry if this one's been done already!
90mph
5. XanthosNZ
Cancerous Bus Crash
24 Mar '05 08:39
Originally posted by Alcra
90mph
Bzzt! Wrong.

(assuming non-sarcasm (does that have a hyphen? (does it matter?)))
6. 24 Mar '05 13:32
Originally posted by PBE6
Can't win, don't try!
I'm sure i said that??????