A train passes two persons walking in the same direction at a speed of 3 km/hr and 5 km/hr respectively in 10 seconds and 11 seconds respectively. The speed of the train is :

A train passes two persons walking in the same direction at a speed of

1.	A train passes two persons walking in the same direction at a speed of 3 km/hr and 5 km/hr respectively in 10 seconds and 11 seconds respectively. The speed of the train is :
A.	8 km/hr
B.	7 km/hr
C.	5 km/hr
D.	4 km/hr
Answer» D. 4 km/hr

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A train passes two persons walking in the same direction at a speed of 3 km/hr and 5 km/hr respectively in 10 seconds and 11 seconds respectively. The speed of the train is :

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