A train takes 10 seconds to cross a man standing on a platform and 44 seconds to cross the platform. What is the length of the platform if the speed of the train is 72 km/hr?
Answer & explanation
Correct answer: option 3
The correct answer is Option 3: 680 m
Speedtrain = \(\frac{Distance}{Time }\)
72*\(\frac{5 }{18 }\) m/sec = \(\frac{\text{length of train}}{10 }\)
length of train = 200 m
In order to find the length of platform:
72*\(\frac{5 }{18 }\) m/sec = \(\frac{\text{Length of platform + 200} }{ 44}\)
20 × 44 = Length of train + 200
880 - 200 = Length of Platform
length of the platform = 680m