If I answer again ban me please. (smile)Yes, It looks like the quote function is not working.
This link (#6) will show you I copied the question on Page 3 here post 30 exactly as it is on the link so I didn't ask the question incorrectly and the formula worked perfectly (yet I agree not the formula about the car)
http://www.mathwarehouse.com/riddles/math-riddles.php
Guess they didn't ask it correctly but OMG I'm still wondering .....or forget it.
Really I admit if I'm wrong here on PJ and even say I'm sorry and I wasn't being stubborn, I just couldn't see if the formula was right how it could not be the only answer but I was wrong.
Let's do this again sometime, like in maybe a hundred years.