(i)two trains running in opposite directions at 36 km/hr and 45 km/hr cross each other in 20 s.if one train is 200 m long,the length of another train is
(a) 200 m(b)250 m (c)300 m (d)none
(ii)a train 220 m long is running with a speed of 60 km/hr.in what time will it cross a man who is running at 6 km/hr in direction opposite to that in which the train is going.
(a)12 sec (b)12 min (c)12 hours (d) none
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