Question

Solve this plzz.. .....
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Answer 1

take the speed in still water as x and the speed of the current be y

due to current,,when it go downstream its speed increases to x+y

so

20/(x+y)=2. i)

4/(x-y)=2......ii)

from.first

10=x+y

from ii)

2=x-y

adding both

12=2x

x=6

y=4