Question:
A train running at 60 km/hr takes 30 seconds to cross a platform of 400 meters. What is the length of the train?
A train running at 60 km/hr takes 30 seconds to cross a platform of 400 meters. What is the length of the train?
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Always convert km/hr to m/s by multiplying by 5/18 when dealing with seconds and meters.
Updated On: Jun 26, 2026
- 200 m
- 300 m
- 100 m
- 500 m
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Concept
$\text{Total Distance} = \text{Speed} \times \text{Time}$. $\text{Total Distance} = \text{Train Length} + \text{Platform Length}$.
Step 2: Conversion
- Speed = 60 km/hr = $60 \times \frac{5}{18}$ m/s = $\frac{50}{3}$ m/s.
Step 3: Calculation
- Total Distance = $\frac{50}{3} \times 30 = 500$ meters. - Train Length + 400 m = 500 m. - Train Length = 100 m. Final Answer: (3)
$\text{Total Distance} = \text{Speed} \times \text{Time}$. $\text{Total Distance} = \text{Train Length} + \text{Platform Length}$.
Step 2: Conversion
- Speed = 60 km/hr = $60 \times \frac{5}{18}$ m/s = $\frac{50}{3}$ m/s.
Step 3: Calculation
- Total Distance = $\frac{50}{3} \times 30 = 500$ meters. - Train Length + 400 m = 500 m. - Train Length = 100 m. Final Answer: (3)
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