Question

a train 100 metres long running at 54km/hr takes 25 sec to pass the bridge what is the length of the bridge​

Answer 1

Speed in m/s = $54*\frac{5}{18}\\3*\frac{5}{1} \\15m/s$

Time = $25seconds$

Distance = $Time * Speed\\25*15\\375$

Length of the platform = Distance - Length Of The Train

$375-100\\275m$

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Answer 2

The length of the bridge​ is 275 m

Step-by-step explanation:

Length of train = 100 m

1 km = 1000 m

1 hour = 3600 sec

Speed of train = 54 km \hr = $54 \times \frac{1000}{3600}= 15 m/sec$

Let the length of bridge be x

So, Total distance = 100+x

Time = 25 sec

$Time= \frac{Distance}{Speed}$

$25= \frac{100+x}{15}$

$25 \times 15=100+x$

$375 = 100+x$

$375-100=x$

275 = x

Hence the length of the bridge​ is 275 m

#Learn more:

A train travelling at 54km/hr crosses a bridge in 80 sec. what is the length of the train if the length of bridge is 800m?

https://brainly.in/question/7122627