Find the time taken by 180 M long train running at 54 km/hr to cross a man standing on a platform ?A4 secondsB12 secondsC30 secondsD15 secondsAnswer: B. 12 secondsRead Explanation:Solution:Given:Length of Train = 180 mSpeed of Train = 54 km/hr =54×518m/sec= 54\times{\frac{5}{18}}m/sec=54×185m/sec=3×5=15m/sec=3\times{5}=15 m/sec=3×5=15m/secTime taken by the train to cross the man standing on the platform =18015=12sec=\frac{180}{15}=12 sec=15180=12sec Open explanation in App