Question

If a car travel first 40km at speed of 20km/h and next 80km at a speed of v km/h. If the average speed of car is 30km/h during entire journey, What should be the value of v?
a) 20 km/h
b) 40km/h
c) 60 km/h
d) 50km/h

Answer 1

Answer:

Answer is sixty sixty 60

Explanation:

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Answer 2

Answer:

B)40 km./h

Explanation:

the average v and 20 is 30

(v+20)÷2

30×2=20+v

60=20+v

v=60-20

40 km./h