In which direction? If they’re going north I wouldn’t imagine either would make it very far at all at those speeds.Maybe the guy who sets off second doesn’t WANT to overtake the guy who set off first. Maybe he’s one of those guys who drives really fast up behind you then sits on your arse waiting for you to get out of the way.What cars are they in? They’ll need to stop for petrol at some point.What’s the traffic like? Are the 2 cars able to maintain their speeds given the traffic? Would it be possible to overtake due to cars travelling in the opposite direction?What’s the speed limit? If it’s lower than 80km/h, what are the chances the 2nd driver will be pulled over by the police?Phew… variables done.Now, if it was a nice straight road with no traffic, both cars were the exact same specification and accelerated at the same rate, and neither car had to stop for petrol, the 1st car would’ve been going for 4 hours and the 2nd car for 3, but the question doesn’t specify whether the clock starts when car 1 or 2 sets off.Either way, no roads from Dehradun are suitable for this experiment