the distance between delhi and agra is 300 km a person starts his journey from delhi to agra with the speed of 45 km/p for 3h now how fast should he drive so that the average speed of entire journey would be 60km/h
Answers
Answered by
3
Please mark me as Brainliest please
Attachments:
Answered by
3
Answer:
From Delhi to Agra:
Speed = 30km/h
Time = d/30 hrs (because time = distance/speed)
From Agra to Delhi:
Speed = 60km/h
Time = d/60 hrs
To sum up:
Total distance travelled = 2d kms
Total time taken = d/30 + d/60 hrs
Avg speed = Total distance / Total time
On calculation,
Avg speed = 40 km/h
Similar questions