Question

Speed of a goods train is 72 km/hr. This train crosses a 250 meter platform in 26 seconds. Then find the length of goods train?

Answer 1

Hey mate here is your answer

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First convert speed from km/hr to m/sec

So, Speed = 72*(5/18) = 20 m/sec

Time = 26 seconds

Let the length of the train be x meters.

We know, Distance = Speed*Time.

[you can remember this formula as remembering DUST = D*ST... Distance=Speed*Time]

x+250 = 20*26

=> x = 270 meters

So length of the goods train is 270 meter

HOPE IT HELPS!

Answer 2

Given values :

Speed of the goods train is = 72 km/hr .

Distance covered by the train in 26 seconds = 250 m .

Let the length of the train be x metres .

1 km = 1000 m .

1 hr = 60 s × 60 s = 3600 s .

72 km/hr

⇒ 72 × 1000 m / 3600 s

⇒ 72 × 10/36 m/s

⇒ 2 × 10 m/s

⇒ 20 m/s

The speed of the train in metre/second is 20 .

We know that distance = speed × time

⇒ distance = 20 m/s × 26 s

⇒ distance = 520 m .

Now the distance of the platform + length of train = distance travelled.

⇒ x + 250 = 520

⇒ x = 520 - 250

⇒ x = 270

The length of the train is 270 m .