Correct option is D
Given:
Time to cross a man = 10 seconds
Time to cross a platform (260 m) = 20 seconds
We are to find the length of the train
Formula Used:
Speed =
Solution:
Let the length of the train = L meters
Speed of train =m/s
Then, for crossing platform:
L + 260 = 2L
260 = 2L - L = L
L = 260 m