.The speed of a boat in still water is 13 km h-!. If the boat travels 84.7 km downstream in
5.5 hours, find the speed of the stream.
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QUESTION :
The speed of a boat in still water is 13 km h-!. If the boat travels 84.7 km downstream in
5.5 hours, find the speed of the stream.
Step-by-step explanation:
let X be the speed of the stream
speed of the boat in still water = to 8 km /hr
thus the speed of the boat in upstream =(8-x) km/hr
speed of the boat in downstream =(8+x )km/hr
the time taken by boat to cover 15 km
the time taken by boat to cover 22 km
total time =5hrs (given)
x=3
since speed cannot be negative
Therefore speed of steam is 3km/hr
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