Question
Train A running with a sped of 126 km/h crosses a
vertical pole in 22 seconds. Speed of train A is 6 m/s less than speed of train B, and length of train B is 80 metres less than length of train A. Find the time taken by train B to cross a 212 metre long tunnel.Solution
Speed of train A = 126 × 5/18 = 35 m/s Speed of train B = 41 m/s Length of train A = 22 × 35 = 770 metres Length of train B = 770 – 80 = 690 metres Desired time = (690 + 212)/41 = 22 seconds
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