Question
A man can row `9 1/3` kmph in still water and finds hat it takes him thrice as much time to row up than as to row down the same distance in the river . The speed of the current is :
Answer: Option C
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Let speed upstream be `x` kmph . Then speed downstream = 3`x` kmph
Speed in sill water = `1/2 (3x + x)` kmph = 2`x` kmph
`:.` `2x = 28/3 rArr x = 14/3`.
So speed upstream = `14/3` km/hr;
Speed downstream = 14 km/hr
Hence , speed of the current = `1/2 (14 - 14/3)` km/hr
=`14/3` km/hr = `4 2/3` km/hr
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