A train having length 150 metres takes 8 seconds to cross a 250 metres long bridge. How much time (in seconds) will this train take to cross a 500 metres long bridge?
Show answer & explanation
Correct answer: C
Explanation
Length of the train = 150 meters
Length of the first bridge = 250 meters
Time = 8 seconds
Total distance to cross the first bridge = 150 + 250 = 400 meters
Speed of the train = 400/8 = 50 meters/second
Total distance to cross the 500-meter-long bridge = 150 + 500 = 650 meters
Time = 650/50 = 13 seconds