A boatman row 1 km in 5 min along the steam and 6 km in 1 h against the stream. The speed of the steam is ?

A boatman row 1 km in 5 min along the steam and 6 km in 1 h against th

1.	A boatman row 1 km in 5 min along the steam and 6 km in 1 h against the stream. The speed of the steam is ?
A.	3 km/h
B.	6 km/h
C.	10 km/h
D.	12 km/h
Answer» B. 6 km/h

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