Science, asked by fantic577, 4 months ago

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 tammarapuaditya

3

Please mark me as Brainliest please

Attachments:

Answered by XxHeartHeackerJiyaxX

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

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