Caleb's parent drove him to a swim meet 208 km away. it took them 2 hours, which included a 15-minute break to refuel. what was their average driving speed?

Caleb's parent drove him to a swim meet 208 km away. It took them 2 hours, which included a 15-minute break to refuel. What was their average driving speed?

NB – The driving speed does not factor in the stop time

Distance covered =208 km

Driving time is 2 hours (120 minutes) – 15 minutes

Driving Speed = 105 minutes

Driving Speed in hours = 1.75 hours

Speed = Distance/Time

Average driving speed = 208 ÷ 1.75

Average driving speed = 118.86 KPH

do you have a formula possibly

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.