# What is the Length of Bridge? If

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The length of the bridge, which a train 130 meters long and travelling at 45 km/hr can cross in 30 seconds is:

- 245 m
- 225 m
- 200 m
- 250 m

Best answer

**Answer: (1) 245 m
Explanation:-**

Let be the length of the bridge = X m

Speed of the train = 45km/h = 45 x 5/18

= 25/2 m/sec.

According to the question,

(X + 130)/(25/2) = 30

2(X + 130) = 30 x 25

2X + 260 = 750

2X = 750 – 260

2X = 490

X = 490/2 = 245

Hence, the length of the bridge is 245 m.