A-1:

	A train 360 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
	A. 40 sec B. 42 sec C. 45 sec D. 48 sec

Answer: Option A
Explanation:

Formula for converting from km/hr to m/s:   X km/hr =		X x	5		m/s.
			18

Therefore, Speed =		45 x	5	m/sec	=	25	m/sec.
			18			2

Total distance to be covered = (360 + 140) m = 500 m.

Formula for finding Time =		Distance -----------
		Speed

Required time =		500 x 2 ---------	sec	= 40 sec.
		25