The speed of a boat in still water is 12 km per hour. Going downstream it moves at the rate of 19 km per hour. The speed of the boat against the stream is ?

The speed of a boat in still water is 12 km per hour. Going downstream

1.	The speed of a boat in still water is 12 km per hour. Going downstream it moves at the rate of 19 km per hour. The speed of the boat against the stream is ?
A.	5 km/hr
B.	3 km/hr
C.	8 km/hr
D.	Data inadequate
Answer» B. 3 km/hr

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