Question

A train covers 150 km in 3 hours , next 125 km in 2 hours and last 180 km in 3 hours 30 minutes . Find the average speed of the train .​

Answer 1

Solution

Given:-

• A train covers 150 km in 3 hours , next 125 km in 2 hours and last 180 km in 3 hours 30 minutes

Find :-

• Average speed of train

Explanation

Using Formula

★ Speed = Distance/Time

We Calculate in three steps of speed trains,

Steps 1.

• Distance = 150 km
• Time = 3 hours

==> Speed of train = 150/3

==> Speed of train = 50 km/h

Steps 2.

• Distance = 125 km
• Time = 2 hours

==> Speed of train = 125/2

==> Speed of train = 62.5 km/h

Steps 3.

• Distance = 180 km
• Time = 3 hours 30 minutes = 210 minutes

==> Speed of train = 180/210

==> Speed of train = 6/7 kh/m

Or,

==> Speed of train = 6 × 60/7

==> Speed of train = 360/7

==> Speed of train = 51.42 km/h

Now, Calculate average speed of train.

==> Average Speed of train = (50+62.5+51.42)/3

==> Average Speed of train = 163.82/3

==> Average Speed of train = 54.60

Hence

• Average Speed of train = 54.60. km/h

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