A car travels 50 km/h for 30 min, 40 km/h for next 15 min and then 60 km/h for another 1 hour. Calculate the average speed of the car.
2 answers
Use the formula Distance=Rate*Time
Luchia's formula will enable you to calculate the distance of each portion of the trip. Then you just need to remember that
avg_speed = total_distance/total_time
avg_speed = total_distance/total_time