A train having length 330 metres takes 11 seconds to cross a 550 metres long bridge. How much time will the train take to cross a 570 metres long bridge?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. (45/4) seconds.
Length of train = 330 m
Length of bridge1 = 550 m
Length of bridge2 = 570 m
Speed of the train = (length of train + Length of bridge1)/Time taken
⇒ (330 + 550)/11 = 80 m/s
Now, the Time is taken to cross the bridge2 = (330 + 570)/80 = 900/80
⇒ 45/4 seconds