the speed of a boat in still water 9 km/h and a speed of a stream is 2km /h find the time take by the boat to go 14 kn upstream
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Speed of boat =9 km/hr
Speed of stream =x km/hr
Speed of boat downstream = speed of boat + Speed of stream
=(9+x) km/hr
Distance covered by boat in 4 hrs upstream =54 km
Speed of boat upstream (9+x)=
4
54
=13
2
1
x=13
2
1
−9 km/hr=4.5 km/hr
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Answer:
2 hours because the speed of boat is 9 water speed is 2 so 9-2=7 7kmph so two hours
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