A Train 150m long is running at 72 km/hr. It crosses a bridge in 13 sec. Find the Length of the Bridge

By K Balaji|Updated : November 12th, 2022

The length of the bridge is 110 m.

Given that Speed of the train = 72 km/hr

On concerting the above value we get

= 72 x 1000/3600 m/sec

= 72 x 5/18 m/sec

= 20 m/sec

Also given that time taken to cross the bridge = 13 sec

Therefore, total distance covered by the train = 20 x 13 = 260 m

Hence, length of the bridge = 260 - 150 = 110 m

Speed

The distance travelled in relation to the time it took to travel that distance is how speed is defined. Since speed simply has a direction and no magnitude, it is a scalar quantity.

There are four different forms of speed.

  1. Uniform speed
  2. Variable speed
  3. Average speed
  4. Instantaneous speed

The table below provides the speed formula:

s = d/t

Where,

d is the distance traveled in m

s is the speed in m.s-1

t is the time taken in s

Speedometers are used to measure speed in moving vehicles. Odometers are used to calculate the distance travelled. A graph can be used to calculate speed as well. The distance-time graph aids in comprehending an object's speed.

Summary:-

A Train 150m long is running at 72 km/hr. It crosses a bridge in 13 sec. Find the Length of the Bridge

A train 150m long is running at 72 km/hr. It crosses a bridge in 13 sec. The length of the bridge is 110 m.

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