A boat goes 48 km downstream in 20 h. It takes 4 h more to cover the same distance against the stream. What is the speed of the boat in still water ?

A boat goes 48 km downstream in 20 h. It takes 4 h more to cover the s

1.	A boat goes 48 km downstream in 20 h. It takes 4 h more to cover the same distance against the stream. What is the speed of the boat in still water ?
A.	2.2 km/h
B.	2 km/h
C.	4 km/h
D.	4.2 km/h
Answer» B. 2 km/h

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