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A streamer goes downstream and covers the distance between to porte in 3 hours while it covered do small distance upstream in 4 hours if the speed of the stream is 3 km /hr find the speed of the steamer in still water |
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Answer» let the SPEED of streamer is =xkm/hr speed of STREAM is=3km/hr to go down stream it take =3 HRS down stream =3 (x+3) =3x+9..... (1) up stream = 4 (x-3) =4x-12... (2) by equation (1)and (2) 3x+9=4x+123x-4x=12-9-x=-3x=3 |
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