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Find the length of the bridge, which a train 130 metre long and travelling at 45 km/hr can cross in 30 seconds.1. 245 metre2. 225 metre3. 200 metre4. 250 metre |
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Answer» Correct Answer - Option 1 : 245 metre Given: Speed \(=\left(45 \times \dfrac{5}{18}\right)\) m/sec \(=\left(\dfrac{25}{2}\right)\) m/sec Time = 30 sec. Formula Used: Distance = Speed × Time Calculation: Let the length of bridge be x metres. \(\dfrac{10+x}{30}=\dfrac{25}{2}\) ⇒ x = 245 m. Conclusion: Length of bridge will be 245 metres |
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