Question

odometer of a car reads 3000 km at the start of a trip and 3800 km at the end of a trip.if the trip took 4 hours . Calculate the avg. speed of the car in km per hour and m per sec

Answer 1

avg. speed =3800-3000/4=800/4=200km/h
or
200×1000/3600 m/s=500/9 m/s

Answer 2

the car travelled for 800 km in 4 hours
...so 800/4=200 km/h