Question

A man stands by a railway track. A train travelling at 40m/ s takes 2.0s to pass the man. What is the length of the train?
a) 20 m
b) 38 m
c) 40 m
d) 80 m

Please just answer as soon as possible. Explanations are not needed, the answer alone is enough.

Answer 1

Answer:

Distance= 40×2= 80m

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Explanation:

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Answer 2

Given: the speed of the train, s = 40 m/s

           the time taken by the train, t = 2.0 s

To Find: the length of the train, L.

Solution:

To calculate L, the formula used:

• distance = speed x time
• d = s x t
• Here, the distance covered by the train is the length of the train
• So, length of the train = distance covered by the train
• Length of the train = speed of the train x time taken by the train
• L = s x t

Applying the above formula:

L = s x t

  = 40 x 2

  =  80

L = 80 m

Hence, the length of the train is 80 meters.