Question

The speed of a boat in still water is 9 times the speed of the stream. The boat travels a distance of 54 km
upstream and the same distance downstream and it takes 4 hours 3 minutes for the whole journey. The speed
of the boat, in km/h, while going upstream, is​

Answer 1

Answer:

speed is equals to distance upon time

distance is equals to 54 into 2

that is 158 kilometre

time is equals to 4 hours x 3 upon 60 hours

so time is 1 upon 5hours

speed is equals to 158 upon 0.2

answer is 790

Answer 2

Answer:

The speed of the upstream is the 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

=x=13

2

1

So, that the upstream is −9 km/hr=4.5 km/hr..

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