Question

The speed of the boat in still water is 8 km/h. It can
go 5 km upstream and 22 km downstream in
3 hours. Find the speed of the stream.​

Answer 1

13.5 this is the answer

Answer 2

Answer:

3 km/hr or 8/3 km/hr

Step-by-step explanation:

Time in upstream + downstream =3 hrs

Speed upstream= 8-x

Speed downstream = 8+x

5/(8-x)+22/(8+x)=3

5(8+x)+22(8-x)=3(8+x)(8-x)

40+5x+176-22x=192-3x²

3x²-17x+24=0

Solving quadratic equation, x= 3 km/hr or x= 8/3 km/hr

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