need4speed

30mph

OMFG, sorry, I wrote it wrong. very wrong, so very very very wrong. Lemme write this right & apologize for my oversight:
There is a circle-shaped race track a mile in length.
A driver circles the track twice, going at 30mph.
How fast does he have to go the third time so that in the 3 circles combined his velocity measures out as having been 60mph?
Again, VERY sorry... wow what a stupid mistake...

he can't average 60mph after 3 laps. because 60mph is 1 mile per minute, he must complete 3 laps in 3 minutes, but since 30mph is 1 mile every 2 minutes, he's already take 4 minutes circling the track twice.

yep.

yup, I think you're dad is laughing at you right now because you are trying to find an answer when there is none Tough there is one answer: There is no answer X) If the driver would ride 60 mph 3 circles on a 1 mile long track, it would take him 3 minutes. But if he goes only 30mph for 2 circles, he spends 3 3/5 minutes... And there's no way you can turn back time

umm yea, my dad's not really laughing, I came to the solution in what had to be under 5 minutes, which is why i replied "yep" to the guy who wrote the solution four hours before you did. But either way; yes, right answer. No, my dad's not laughing, I am.