A man in a train travelling at 25km/hr notices that a train going in the opposite direction passes him in 10 sec.If the length of this train is 110m find its speed . Choose the correct choice from the following choices:
A) 30 km/hr
B) 40 km/hr
C) 50 km/hr
D) 60 km/hr
E) 70 km/hr
relative speed of trains = 110/10 mtrs/sec = 110*18/(10*5)= 40 km/hr   speed of 2nd train = 110-40= 
<gadget id="calculator">110-40</gadget>
<output>70</output>
70 km/hr   ANSW70 km/hrR:70 km/hr
<result>E</result>
A man in a train travelling at 25km/hr notices that a train going in the opposite direction passes him in 10 sec.If the length of this train is 110m find its speed .