Question

A car travels 30 kilometre at a uniform speed of 40 kilometre per hour and next 30 kilometre at a uniform speed of 30 kilometre per hour find its average speed and average velocity

Answer 1

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Answer 2

Answer:

The average speed is 34.285 km/h and the average Velocity is equal to average speed i.e., 34.285 km/h.

Explanation:

Given, Distance = 30 kilometer

Speed = 40 kilometer per hour

Therefore, Time taken = Distance / Speed

= 30 / 40 = 3/4 hours

Again,

Given, Distance = 30 kilometer

Speed = 30 kilometer per hour

Therefore, Time taken = Distance / Speed

= 30 / 30 = 1 hour

Average Speed = Total distance / Total time taken

= 30 + 30 / 3/4 + 1 = 60 / 7/4

= 60 × 4/7 = 34.285 (answer).

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