A train B speeding with 120 km crosses another train C running in the same direction in 2 minutes if the lengths of the trains B and C be 100 meter 220 meter respectively what is the speed of the train C
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Let the speed of train C be x kmph.
Speed of train B relative to C = (120 - x) kmph
= [(120−x)×518] m/sec
= (600−5x18) m/sec
Distance covered = 100 + 200 = 300 m
∴300(600−5x18) = 120
=> 300 = 120(600−5x)18
=> 10 × 9 = 2 ( 600 - 5x )
=> 90 = 1200 - 10x
=> 10x = 1200 - 90
=> x = 111010 = 111
Hence, the speed of train C is 111 kmph.
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