Answers

2014-06-04T17:23:00+05:30
Total distance travelled by train = length of the train + length of bridge 
                                             = 500 + 160  = 660m
speed = distance/time
          = 660/33
          = 20m/s.
speed = 20*3600/1000 Km/hr  (1m = 1/1000 Km.     1s = 1/3600 hr.)
          = 72Km./hr.
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2014-06-04T17:37:43+05:30
Length of train = 500mLength of bridge= 160mtotal length to be covered = 500m + 160m = 660mtime taken = 33secSpeed in m/sec = 660/33 = 20 m/secSpeed in km/hr = 72 km / hr
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