Question

A train travels 120 km in 2hours 30min . What is its average speed in km/s

Answer 1

A train travels 120 km in 2 hours and 30minutes. What is its average speed?

We know Speed = distance/time

Distance = 120 km

Time = 2 hours 30 minutes = 2.5 hours

Average Speed = to find out

Average Speed = 120 km/ 2.5 hour

Average Speed = 48 km per hour

The average speed of the train is 48 km/hour

Answer :The average speed of the train is 48 km/hour

Answer 2

Given :-

Distance travelled by the train = 120 km

Time taken by the train = 2 hours 30 min

To Find :-

The average speed of the train in km/s.

Analysis :-

Here we are given with the distance covered and the time taken by the train.

In order to find the average speed, substitute the values accordingly such that speed is equal to total distance divided by time taken.

Solution :-

We know that,

• s = Speed
• d = Distance
• t = Time

Using the formula,

$\underline{\boxed{\sf Average \ speed=\dfrac{Distance \ covered}{Time \ taken} }}$

Given that,

Distance (d) = 120 km

Time (t) = 2 hour 30 min = 150 min = 9000 sec

Substituting their values,

⇒ 120/9000

⇒ 0.01 km/s

Therefore, the average speed of the train in km/s is 0.01 km/s.