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.

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. Correct Answer 8

Let, the speed of Stream = x,so, downstream speed = 16+x and upstream speed = 16-xATQ,16+x = 3(16-x)Or, 16+x = 48 -3xOr, 4x = 32Or, x =8So speed of stream = 8 and difference of speed of still water & stream = 16–8 = 8km/hr    
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