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Question

A train of the length of 500 meters is running at a speed of 100 km/hr. The train takes 50 seconds to cross a tunnel. Find the length of the tunnel?

  • 666
  • 777
  • 888
  • 999
Answer- C

Let the length of the tunnel = X meters

Time = 50 seconds

Distance to be covered = (X + 500) meters

Speed = 100 x 5/18 =250/9 m/s

Speed = Distance/Time

250/9 = (X+500)/50

250 * 50= 9X + 4500

12500= 9X +4500

9X= 8000

X = 888.88 meters