A man can swim in still water at 4.5 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is?
A.3
B.7.5
C.2.25
D.1.5
Answer:D
A man can swim in still water at 4.5 km/h, but takes twice as long to swim upstream than downstream. The speed of the stream is?
A.3 B.7.5 C.2.25 D.1.5