Question

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

WELL EXPLAINED
AND QUICK ANSWER
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Answer 1

Answer:

110 metre length

Step-by-step explanation:

given 》 train length = 150m

》 speed = 72km/h = 72×5/18 = 20m/s

》bridge length - train lenth=

》20×13 = 260 -150

》 bridge length = 110m ans

Answer 2

Answer:

110m

Step-by-step explanation:

We can solve using this equation:

Speed = Distance ÷ Time

                        Distance                    =         Speed        ×        Time

(length of bridge + length of train) = (speed of train) × (time to cross bridge)

So apply the above statement:

x + 150 = 72km/h * 13s

Convert 72km/h to m/s

⇒ 72000m/3600s  =  20m/s (speed of train)

Now Solve:

⇒x + 150m = 20m/s × 13s

⇒x + 150m = 260m

⇒x = 260m - 150m

⇒x = 110m (length of bridge)

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