Question

A car travels 1/3 of the distance on a straight road
with a velocity of 10 km/h, the next 1/3 with a
velocity of 20 km/h and the last 1/3 with a velocity
of 60 km/h. What is the average velocity of the car
for the whole journey?
(a) 18 km/h
(b) 10 km/h
(c) 20 km/h
(d) 15 km/h
​

Answer 1

Answer:

18km/hr

Step-by-step explanation:

v avg= Total distance/total time

Let total distance = S

v avg= S/(S/3*10)+(S/3*20)+(S/3*60)

= 18km/h