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1. Rahim can now 16 km/hr in still water. It takes her thrice as long to row up as to row down the river. Find the difference between her speed (km/hr) in still water and that of the steam.
- A. 8
- B. 8
- C. 8
- D. 8
Answer: Option A
Explanation:
Let, the speed of Stream = x
,so, downstream speed = 16+x and upstream speed = 16-x
ATQ,
16+x = 3(16-x)
Or, 16+x = 48 -3x
Or, 4x = 32
Or, x =8
So speed of stream = 8 and difference of speed of still water & stream = 16–8 = 8km/hr
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