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- A man can swim in still water at 4.
Question 1:
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
Feedback M = 4.5
S = x
DS = 4.5 + x
US = 4.5 - x
4.5 + x = (4.5 - x)2
4.5 + x = 9 -2x
3x = 4.5
x = 1.5
S = x
DS = 4.5 + x
US = 4.5 - x
4.5 + x = (4.5 - x)2
4.5 + x = 9 -2x
3x = 4.5
x = 1.5
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