Question

solve the problem please

Answer 1

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Answer 2

let the speed in still water be x and distance be s

speed upstream=x-2

s/x-2=5

s=5x-10

5x-s=10..............(1)

speed downstream=x+2

s/x+2=4

s=4x+8

4x-s=-8............(2)

(1)-(2)     5x-s-4x+s=18

x=18....... substituting in (2)

s=80

speed downstream=18km/hr   distance =80km