Question

a police car drives for 2 hours 25 minutes with a constant speed of 120 km/h and then another 1 hour 45 min with a constant speed of 84 km/h. what distance did it go?

Answer 1

speed v = 120 km/hr
for time t = 2h 25min = 2 + 25/60 hrs = 145/60  hrs
distance traveled = 120 * 145/60 = 290 km

speed = 84 km/hr
duration = 1h 45 min = 105/60 hr
distance traveled = 84 * 105/60 = 147 km

Total distance traveled = 290+147 = 437 km