A train having length 250 metres takes 12 seconds to cross a 350 metres long bridge. How much time (in seconds) will this train take to cross a 900 metres long bridge?
Show answer & explanation
Correct answer: B
Explanation
Distance on the first bridge = 250 + 350 = 600 meters
Speed = 600 / 12 = 50 m/s
Distance on the second bridge = 250 + 900 = 1150 meters
Time = 1150 / 50 = 23 seconds