Question

a man can row 18 kilometre per hour in still water if it takes him twice as long to row up as to row down the river then rate of stream is is​

Answer 1

Answer:

6 km/hr

Step-by-step explanation:

t1=1/(18+x)

2t1=1/(18-x)

1/(18-x)-2/(18+x)=0

(18+x-36+2x)/(324-x^2)=0

-18+3x=0

3x=18

x=6