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

By BYJU'S Exam Prep

Updated on: September 25th, 2023

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

Table of content

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

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.

Uniform speed
Variable speed
Average speed
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.

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