Anyone up for a Riddle?

[CEH]

This old car must go up the hill and come down the other side. It's one mile up and one mile down.
Going up the hill it averages a max of 15 mph.

To make the entire 2 mile trip at an average of 30 mph, how fast does the car need to go down the hill?

 

[NEhomer]

Noone said there'd be math.

 

[CEH]

you’re not alone. albert einstein had issues with this problem

 

[Broncosr0k]

Tricky....tricky....

 

[megalodon30]

The answer is 6.

 

[CEH]

So to go up the hill at 15 mph for 1 mile will take 4 mins.
To travel 2 miles at 30 mph will take you 4 minutes.

So its a trick question. It would have to come down the back side at the speed of light.

 

[Orange Crush77]

987 mph

 

[listopencil]

45