A Bus 125 m long passes a man, running at 5 km/hr in the same direction in which the bus is going, in 10 seconds. The speed of the bus is:  Pick one
A) 100 km/hr	B) 50 km/hr	C) 55 km/hr	D) 60 km/hr	E) 35 km/hr
speed = 125/10=25/2   ==&gt;25/2*18/5   ==&gt;45 km/hr   speed of bus x km/hr   x-5 km/hr ==&gt; 45   x = 50 km/hr   ANSWER 50 km/hr
<result>B</result>
A Bus 125 m long passes a man, running at 5 km/hr in the same direction in which the bus is going, in 10 seconds. The speed of the bus is: