Question
A man can row 7 ½ kms on hour in still water and he finds that it takes hi twice as long to row down the river. The rate of stream is
Answer: Option B
LET THE RATE OF THE STREAM BE X KM/HR.
THEN SPEED DOWNSTREAM = (15/2 + X)KM/HR.
SPEED UPSTREAM = (15/2 -X)KM/HR
(15/2 + X) = 2 (15/2 – X)
=> 3X =15/2
=> X = 15/6 = 5/2 = 2.5
THEREFORE, RATE OF STREAM = 2.5 KM/HR
Was this answer helpful ?
LET THE RATE OF THE STREAM BE X KM/HR.
THEN SPEED DOWNSTREAM = (15/2 + X)KM/HR.
SPEED UPSTREAM = (15/2 -X)KM/HR
(15/2 + X) = 2 (15/2 – X)
=> 3X =15/2
=> X = 15/6 = 5/2 = 2.5
THEREFORE, RATE OF STREAM = 2.5 KM/HR
Was this answer helpful ?
More Questions on This Topic :
Latest Videos
Latest Test Papers
Submit Solution