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 joumey. The speed
of the boat, in kmh. while going upstream, is​

Answer 1

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)=

4

54

=13

2

1

x=13

2

1

−9 km/hr=4.5 km/hr

Answer 2

Answer:

Speed of boat in still water is 16 km/hr. If the speed of the stream is 4 km/hr, find its downstream and upstream speeds.