Question

2. (a) Define average speed. (b) A bus travels a distance of 120 km with a speed of 40 km/h and returns with a speed of 30 km/h. Calculate the average speed for the entire journey .

Answer 1

Answer:

avg speed is total distance /total time

1 side distance = 120/2=60

avg speed 1 =60/40

avg speed 2=60/30

avg speed =(avg speed)1+2

6/4+6/3

=24+18/12=42/12=70/20=35km h