A boat goes 2 km upstream and 3 km downstream in 20 minutes. Later it goes 7 km upstream and 2 km downstream in 53 minutes. What is speed (in km/h) of the boat in still water?

A boat goes 2 km upstream and 3 km downstream in 20 minutes. Later it

1.	A boat goes 2 km upstream and 3 km downstream in 20 minutes. Later it goes 7 km upstream and 2 km downstream in 53 minutes. What is speed (in km/h) of the boat in still water?
A.	75/7
B.	120/7
C.	135/7
D.	150/7
Answer» D. 150/7

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A boat goes 2 km upstream and 3 km downstream in 20 minutes. Later it goes 7 km upstream and 2 km downstream in 53 minutes. What is speed (in km/h) of the boat in still water?

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