Question
A man can row at 5 km/hr in still water, if the river is running at 1 km/hr it takes him 75 minutes to row to a place and back. How far is the place?
Answer: Option B
SPEED DOWNSTREAM = (5+1)KM/HR = 6 KM/HR
SPEED UPSTREAM = (5-1)KM/HR = 4 KM/HR
LET THE REQUIRED DISTANCE BE X KM.
THEN X/6 + X/4 = 75/60 = 5/4 => (2X + 3X) =15 => X =3.
REQUIRED DISTANCE = 3 KM
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SPEED DOWNSTREAM = (5+1)KM/HR = 6 KM/HR
SPEED UPSTREAM = (5-1)KM/HR = 4 KM/HR
LET THE REQUIRED DISTANCE BE X KM.
THEN X/6 + X/4 = 75/60 = 5/4 => (2X + 3X) =15 => X =3.
REQUIRED DISTANCE = 3 KM
Was this answer helpful ?
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