Question

the train is moving with a velocity of 45km/hr.calculate the distance travelled by it in 1hr,1min,1second

Answer 1

First case,
Speed = 45 km/hr
Time = 1 hr
Distance = speed x time
= 45 x 1
= 45 km ( 45000 m)
Therefore, the train travels 45 km in 1 hour.

Second case,
Speed = 45 km/hr or we can also take as
45000 m/ 60 min
Time = 1 min
Distance = speed x time
=( 45000/60 ) x 1
= 45000 / 60
= 750 metres
Therefore, the train travels 750 m in 1 minute.

Third case,
Speed = 45000 m/ 60 min (or )
45000 m/ 3600sec
Time = 1 second
Distance = speed x time
= (45000 / 3600) x 1
= 45000 / 3600
= 12.5 metres
Therefore, the train travels 12.5 m in 1 second.

I hope the helps you..

Answer 2

Answer:In 1st case we have to calculate the distance in 1km/hr:

Distance=speed×time

=45×1

=45

Therefore, here distance will 45km

Now,come to 2nd case ,here we have to calculate the distance in 1min:

Speed =45km/hr,we can write it as 45000m/60min

Time = 1min

We know, Distance=speed×time

=(45000/60)×1

=750metres

Now, we have the third case in which we have to calculate the distance in 1 second:

Speed =45km/hr=45000m/3600sec

Time =1second

We know, Distance=speed×time

=(45000/3600)×1

= 50/4 metres

That is, 12.5 metres

Explanation: