how long will a yrain 120 m long take to clear a platform 130 m long if its speed is 50 km
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50 km/h = 125/9 m/s
DISTANCE = 120+130 = 250
TIME = 250/125/9
= 18 sec
DISTANCE = 120+130 = 250
TIME = 250/125/9
= 18 sec
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