Question

the speed of a boat in still water is 9km/h and the speed of the stream is 2km/h. find the time taken by the boat to go 35km upward.​

Answer 1

Answer:

4.5 km/hr

Step-by-step explanation:

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)=54/4= 13*1/2

x=13*1/2−9 km/hr=4.5 km/hr

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