Two trains 'A' and 'B' of length 'l' and ' 4l' are travelling into a tunnel of length 'L' in parallel tracks from opposi…
Q1
Two trains 'A' and 'B' of length 'l' and ' 4l' are travelling into a tunnel of length 'L' in parallel tracks from opposite directions with velocities 108 km/h and 72 km/h, respectively. If train ' A ' takes 35 s less time than train ' B ' to cross the tunnel then, length ' L' of tunnel is (Given L=60 l )
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