The speed of a boat in still water is 10 km/hr. If its speed down stream be 13 km/hr, then speed of the stream is ?

The speed of a boat in still water is 10 km/hr. If its speed down stre

1.	The speed of a boat in still water is 10 km/hr. If its speed down stream be 13 km/hr, then speed of the stream is ?
A.	1.5 km/hr
B.	3 km/hr
C.	11.5 km/hr
D.	5.75 km/hr
Answer» C. 11.5 km/hr

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