Question

A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?.

Answer 1

The train will pass a bridge in 40 seconds.

What is the distance?

Distance is defined as the product of speed and time.

Given that A train 360 m long is running at a speed of 45 km/hr.

Speed of train = 45 km/hr.

And it passes a bridge 140 m long.

Length of train = 360 meters

Since 1 km = 1000 meters.

and 1 hour = 3600 seconds

we have to determine the length of the train

So 1(km/hr.) = (1000/3600) = (26/72) meter/seconds

45 km/hr = 45 ×5/18 = 25/2 meter per second

So the speed of the train = 25/2 meters per second

Total distance to be covered = (360+140)m = 500m.

So time will it pass a bridge = distance/speed

Substitute the values of distance and speed in the above formula,

⇒ 500/(25/2)

⇒ 500×2/25

⇒ 40 seconds

Hence, the train will pass a bridge in 40 seconds.

Learn more about the distance here:

brainly.com/question/13269893

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