Question

A train is moving from a to b of distance 119km at a speed of 20km/h and then from b to a with a speed of 36km/h. Calculate average speed and average velocity.

Answer 1

Answer:

The average speed of the train is 43.2 km/h.

Explanation:

Given that,

Speed A to B = 36 km/h

Speed B to A = 54 km/h

Let us consider the distance from A to B is x. The train moves from station A to station B and return from station B to station A.

Therefore, The displacement is zero.

So, The average velocity will be zero.

The distance is the product of the speed and time.

The average speed will be

The time taken from A to B

Time .....(I)

The time taken from B to A

Time .....(II)

Hence, The average speed of the train is 43.2 km/h.