Question

A bus travels one third of the distance with a speed of 12km/h and the remaining distance with a speed of 20 km/h . What is the average speed ​

Answer 1

Answer:

Data: d=1/3, v1=12km/h =12000m/3600s=3.3m/s,

v2=20km/h =20000m/3600s=5.5m/s, v=?

Solution: v=(2v1v2)/v1+v2

V={2(3)(5)}/3+5

V=30/8

V=3.75=4 m/s

Or

V=(2v1v2)/v1+v2

V={2(3.3)(5.5)}/3.3+5.5

V=36.3/8.8

V=4.125=4 m/s.

Answer 2

Explanation:

average speed is 180/11 km per hour