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 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. 2.25D. 1.5 Explanation: M = 4.5 S = x…