Question

A car travels at a uniform speed of 40 km per hour and return at a speed of 60 km per hour. Find the average speed of a car. ​

Answer 1

Explanation:

The total time for the journey is given as,

t= d1 + d2

v1. v2

= 30 + 30

40. 20

=2.25hour

2.25hourThe average speed is given as,

Vavg = d1 + d2

t

= 30 + 30

2.25

= 2.67km/h

Thus, the average speed of the car is 26.67km/h.

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Answer 2

Answer: 50km/h

Explanation:

Average speed is defined as the total path length travelled divided by the total time interval during which the motion has taken place :

Given :

Initial speed = 40km/h

Final speed = 60km/h

To find :

Avg. speed

Solution:

Total time taken = 2hrs

Total distance traversed=(60+40)

= 100km

Avg. speed = 100/2

= 50km/h

Hope it helps!