Question

A train 100 m long is moving with the velocity of 72 km/hr. Find the time it takes to cross the bridge which is 2 km long?​

Answer 1

Answer:

Time taken by the train to cross the bridge is 105 seconds.

Explanation:

Given:

• Length of the train = 100 m

• Velocity of the train = 72 km/hr = 72 × 5/18 m/s = 4 × 5 m/s = 20 m/s

• Length of the bridge = 2 km = 2000 m

To find:

Time taken by the train to cross the bridge.

Solution:

Total distance the train will cover to pass the bridge will be:

Length of bridge + length of train

Length of bridge and train is given, so by keeping their values, we get

Total distance covered by the train to cross bridge = 2000 + 100 = 2100 m

Now, time taken = Distance/velocity

= 2100/20

= 210/2

= 105 sec

Hence the total time taken to cross the bridge is 105 sec.