A train travelling at 36 kmph takes 48 seconds to cross a bridge. It then crosses a man cycling at the rate of 9 kmph in the same direction in 20 seconds. Find the length of the bridge
a)150 m b)220 m c)280 m d)330 m

• speed of the train= 36*(5/18)=10
  10=(Length of train+Length of bridge)/48
  L of train + L of Bridge =480 ---(1)
  Man cycling at the speed of 9kmph, so Speed= 9*(5/18)= 2.5
  2.5=D/20
  Distance i.e length of train = 20 * 2.5= 150
  From equation (1), Length of bridge = 480-150=330 m
• 8 years agoHelpfull: Yes(0) No(3)