A boat can go 15 km upstream and 21 km downstream in 3 hours. It can go 25 km upstream and 7 km downstream in 3 hours. What is the speed of stream in km/h?

A boat can go 15 km upstream and 21 km downstream in 3 hours. It can g

1.	A boat can go 15 km upstream and 21 km downstream in 3 hours. It can go 25 km upstream and 7 km downstream in 3 hours. What is the speed of stream in km/h?
A.	4
B.	3
C.	5
D.	2
Answer» E.

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A boat can go 15 km upstream and 21 km downstream in 3 hours. It can go 25 km upstream and 7 km downstream in 3 hours. What is the speed of stream in km/h?

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