tcs - phani and gopi decided to have a car race initially phani was 20 miles behind gopis car both of them took the race in the same direction along the same route phani was travelling at a constant speed of 68 miles per hour while gopi was travelling at a con - skillgun

Phani has to travel 20 miles first to catch up Gopi. Then, he has to travel an additional 8 miles to be ahead of Gopi. Phani has to travel a total of 28 extra miles relative to Gopi’s car.
Relative Speed of Phani with respect to Gopi = 68 - 60 = 8 miles per hour.
Time taken for Phani to cover 28 extra miles compared to that of Gopi = Extra Distance / Relative Speed of Phani with respect to Gopi = 28/8 = 3.5 hours.