Question

A car travels at a speed of 40 km/hr for 5 min and then at 50 km/hr for 10 min and finally at 25 km/hr for 15 min. Find its average speed

Answer 1

1. speed=distance/time
40=x/5
200=x

2. 50=y/10
500=y

3. 25=z/15
z=375
avg speed = total distance/total time
=(200+500+375)/(5+10+15)
=1075/30
Ans=35.8333

Answer 2

answer is 35.83 km/hr