The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?

The speed of a boat in still water is 5 km/hr, it can go 30km upstrea

1.	The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?
A.	5km/hr
B.	8 km/hr
C.	10 km/hr
D.	15 km/hr
Answer» B. 8 km/hr

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The speed of a boat in still water is 5 km/hr, it can go 30km upstream and return downstream to the original point in 4 hours 30 min. The speed of the stream is_______?

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