Sarthaks Test
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The speed of a boat in still water 10 km/hr. If it can travel 26 km downstream and 14 km upstream in the same time, the speed of the stream is: 

a) 2 km/hr 

b) 2.5 km/hr 

c) 3km/hr 

d) 4 km/hr

1 Answer

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Best answer

Correct option: c) 3km/hr


let the speed of the stream be x km ph.

Speed downstream =(10+x) km ph ;speed upstream =(10-x) km ph 26/(10+x) =14/(10-x) therefore 40x=120 and x=3 km ph

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