A moving train passes a platform 50 metres long in 14
seconds and a lamp-post in 10 seconds. The speed of the train is
(a) 24 km/hr
(b) 36 km/hr
(c) 40 km/hr
(d) 45 km/hr
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Answer / prateik
let length of train=x speed=y
so x/y= 10 sec => x = 10y
now x+50/14 = y
y = 45 km/hr
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