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A train crosses a platform in 50 seconds travelling with a speed of 72 km/hr. If the length of the train is 250 metres, then what will be the length (in metres) of the platform?
- a)600
- b)480
- c)750
- d)950
Correct answer is option 'C'. Can you explain this answer?
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Verified Answer
A train crosses a platform in 50 seconds travelling with a speed of 72...
Let the length of platform be ‘l’
⇒ Distance crossed by train = 250 + l
⇒ Distance = Speed × time
Speed = 72 × 5/18 m/s = 20 m/s
⇒ 250 + l = 20 × 50
⇒ 250 + l = 1000
∴ l = 1000 - 250 = 750 m
⇒ Distance crossed by train = 250 + l
⇒ Distance = Speed × time
Speed = 72 × 5/18 m/s = 20 m/s
⇒ 250 + l = 20 × 50
⇒ 250 + l = 1000
∴ l = 1000 - 250 = 750 m
Most Upvoted Answer
A train crosses a platform in 50 seconds travelling with a speed of 72...
Given data:
- Speed of the train = 72 km/hr
- Time taken to cross the platform = 50 seconds
- Length of the train = 250 metres
Calculating the length of the platform:
- First, convert the speed of the train from km/hr to m/s:
- 72 km/hr = 72 * 1000 / 3600 m/s = 20 m/s
- The total distance covered by the train in 50 seconds is the sum of the length of the train and the length of the platform.
- Distance = Speed * Time
- Distance = 20 m/s * 50 s = 1000 meters
- Length of the train + Length of the platform = 1000 meters
- Length of the platform = Total distance - Length of the train
- Length of the platform = 1000 meters - 250 meters = 750 meters
Therefore, the length of the platform is 750 meters. Option C is correct.
- Speed of the train = 72 km/hr
- Time taken to cross the platform = 50 seconds
- Length of the train = 250 metres
Calculating the length of the platform:
- First, convert the speed of the train from km/hr to m/s:
- 72 km/hr = 72 * 1000 / 3600 m/s = 20 m/s
- The total distance covered by the train in 50 seconds is the sum of the length of the train and the length of the platform.
- Distance = Speed * Time
- Distance = 20 m/s * 50 s = 1000 meters
- Length of the train + Length of the platform = 1000 meters
- Length of the platform = Total distance - Length of the train
- Length of the platform = 1000 meters - 250 meters = 750 meters
Therefore, the length of the platform is 750 meters. Option C is correct.
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A train crosses a platform in 50 seconds travelling with a speed of 72 km/hr. If the length of the train is 250 metres, then what will be the length (in metres) of the platform?a)600b)480c)750d)950Correct answer is option 'C'. Can you explain this answer?
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