80 m.p.h

[Grumpy John]

There's a bunch of these on youtube, some funnier than others.

[Grumpy John]

Now answer this one........
A car travels from A to B at 40mph.
What speed does it have to travel at when returning from B to A to achieve an average speed of 80mph for the whole trip?

[rrich]

Now answer this one........
A car travels from A to B at 40mph.
What speed does it have to travel at when returning from B to A to achieve an average speed of 80mph for the whole trip?

ROTFLMAO!

I know the answer but just let me say this:

"386,000 miles per second isn't just a good idea, it's the law."

[OldGrain]

Good grief, if she`s his wife i hope she`s better at 'other' things.

[Bob38S]

Bet the blond hair is real not bleached.

[Grumpy John]

Good grief, if she`s his wife i hope she`s better at 'other' things.

.......like helping the kids with their homework?

[Chesand]

Bet the blond hair is real not bleached.

I was going to make a similar comment but thought it might be politically incorrect

[FenceFurniture]

There's a bunch of these on youtube, some funnier than others.

Uh huh. So which are the funny ones?

You owe me another 5 minutes Senor.

Now answer this one........
A car travels from A to B at 40mph.
What speed does it have to travel at when returning from B to A to achieve an average speed of 80mph for the whole trip?

Too easy. 120mph, or half that if you're going in reverse with two big tyres inflated hard, and two small tyres that are soft. Half that again if it's a police car.

Probably twice that if you're travelling with a high inflated air-head.

Was her maiden name Bush by any chance?

[Grumpy John]

Uh huh. So which are the funny ones?

You owe me another 5 minutes Senor.

Too easy. 120mph, or half that if you're going in reverse with two big tyres inflated hard, and two small tyres that are soft.

You'll NEVER get that 5 minutes back

That's what I thought at first Brett, but do the math. Remember, we're looking for an average speed of 80 mph.

Hint: rrich is on the right track.

[markkr]

Isn't the law 186,000 miles/sec (300,000 kilometres/sec)?

Mark

[Sawdust Maker]

Now answer this one........
A car travels from A to B at 40mph.
What speed does it have to travel at when returning from B to A to achieve an average speed of 80mph for the whole trip?

That was one of my Dad's favourites when I was a mere lad - I got it eventually

have you heard the "deer crossing sign" phone call

Warning Brett goes for 3:45 mins

here

[Grumpy John]

They must be sisters.

[chambezio]

Two short planks!!!!!!!!!!!(thick as......)

[FenceFurniture]

Warning Brett goes for 3:45 mins

Excellent. I definitely won't click on that and I'll use that as a deposit on the 5 mins the Senor owes me.

[rrich]

Isn't the law 186,000 miles/sec (300,000 kilometres/sec)?

Mark

Yes, it is 186,000. There was a brain disconnect to the fingers while typing.

Let me rephrase GJ's question and perhaps I can make it as clear as mud.

I will use the Imperial system because I don't know the convenient metric numbers of the top of my head.

There is an oval race track exactly 1 mile around. To qualify for the race, the race car driver must average 60 miles per hour or better over two circuits of the track. (Hint: 60 Miles per hour is also one mile per minute.)

For the first lap the race car driver travels at an average 30 Miles per hour. How fast must the race car driver go during the second lap to qualify?

The answer is that it is impossible for the driver to qualify.
Here is why:

Driving two miles (Two circuits of the one mile track) at 60 Miles per hour takes two minutes. (See hint above). Driving one mile at 30 Miles per hour takes two minutes. Thus the race car driver has used too much time to be able to qualify. Even Captain Kirk at warp 9 couldn't qualify driving the second mile.

edit in
After looking at this in the published, I think that substituting klicks for miles I think that it would be accurate.