He is 40 mins away form home because he is going 65 mi/hr = 1 min per mile
hopefully that helps you make an equation

The length of the curve is
So if 18 plus 1/4 of the number is the number the means 18 is 3/4 of the number so 18 divided by 3 is 6 so 1/4 = 6 now add 6 to 18 to get 4/4 of the number which is 24 number = 24
If you mean
3/15+12/6
the answer is 2.2