Answer:
2.5 hours after you start
Explanation:
You are driving 14 mph faster than your friend, so will make up the 35 mile head start in 35/14 = 2.5 hours. You will meet 162.5 miles from your starting location. If that is Philadelphia, you will have 37.5 miles to go.
You will catch up after 2.5 hours of driving.
_____
You will arrive about 9 1/2 minutes ahead of your friend.