Question

motorcycle drive from a to b with uniform speed of 30 kilometre/hour and return back with a speed of 20 kilometre/hours? find the average speed​

Answer 1

We know that the average speed of an object can also be found by dividing the sum of the speeds by 2.

In the first case, the motorcycle drove with a speed of 30 km/h and in the second case, the motorcycle drove with a speed of 20 km/h.

Average speed = 30 + 20 / 2 = 25 km/h

Answer:

The average speed of the motorcycle is 25 km/h.

Answer 2

Answer : Let the length of the line segment AB be x m

The time taken is given as t=distance covered/speed
Total time = t


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​
+t
2
​
=
30
x
​
+
20
x
​
=
60
5x
​
h
Average speed = Total distance/Total time =
5x/60
2x
​
=24 km/h