Question

A motorcyclist drivers from A to B with a uniform speed of 30 km h-1 and returns back with a speed of 20 km h-1. Find its average speed
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Answer 1

Answer:

His average speed is 25kmph

Explanation:

Add both of them and divide by 2 because first he went a to b and then returned back to a total 2 rounds

Answer 2

Answer:

Explanation:

Given :-

Speed of motorcycle from A to B = 30 km/h

Speed of motorcycle from B to A = 20 km/h

To Find :-

Average Speed = ??

Formula to be used :-

Average Speed = Total distance covered/Total time taken

Solution :-

Let the distance covered is x.

Total distance covered = x + x = 2x

Time taken from A to B = x/30

Time taken from B to A = x/20

Total time taken, t = x/30 + x/20 = 5x/60

Now, Average Speed = Total distance covered/Total time taken

⇒ Average Speed = 2x × 60/5x

⇒ Average Speed = 24 km/h

Hence, the Average Speed is 24 km/h.