Question

if a train crosses a pole in 18 seconds while traveling at the speed of 90km/hr then in how much time will the train cross a bridge of length 600 m at same speed

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Answer 1

Speed = 90 km /h or 90 * 5/18 = 25 m/s
Length of train = 18 * 25 = 450 m
Bridge length = 600m
Total distance 600+ 450 = 1050
So time = 1050 / 25 = 42 sec ans

Answer 2

Concept

Speed is the distance a vehicle or person travels in an hour.

Given

Train crosses a pole in 18 seconds at a speed of 90km/hour.

Find

Time which the train takes to cross a bridge of 600m at a speed of 90km/hour.

Step-by-step explanation:

Firstly we have to convert 18 seconds into hour because our speed in km/hour. So,

18 seconds=18/3600=0.005 hour

Now we have to calculate the distance the train travels in 0.005 hour at a speed of 90km/hour

So the distance will be=90*0.005=0.45 km

In 18 seconds the train covers 0.45 km so to cover 600 m it takes time as under:

Time=18*0.6/0.45 = 24 seconds.

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