a man rowing at the speed of 5 km h in still water takes thrice as much time going 40 km upstream as in going 40 km downstream find the speed of the current

A man rowing at the speed of 5 km/ h in still water, takes thrice as much time going 40 km upstream as in going 40 km downstream. Find the speed of the current

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Sneha

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Saturday, 28 November 2020 08:45 AM

Consider,
Speed of rowing by a person $= 5$ km/hr.
Speed of stream $= x$ km/hr
Upstream Speed $= (5 - x)$ km/hr
Downstream speed $= (5 + x)$ km/hr
According to the question,
$? \frac{4 0}{5 - x} = \frac{3 \times 4 0}{5 + x}$

$? 5 + x = 15 - 3 x$

$? 4 x = 10$

$? x = 2.5$ km/hr

Consider,Speed of rowing by a person =5 km/hr.Speed of stream =x km/hrUpstream Speed =(5-x) km/hrDownstream speed =(5+x) km/hrAccording to the question,?5-x40?=5+x3×40??5+x=15-3x?4x=10?x=2.5 km/hr

Related Questions

Consider,
Speed of rowing by a person $= 5$ km/hr.
Speed of stream $= x$ km/hr
Upstream Speed $= (5 - x)$ km/hr
Downstream speed $= (5 + x)$ km/hr
According to the question,
$? \frac{4 0}{5 - x} = \frac{3 \times 4 0}{5 + x}$

$? 5 + x = 15 - 3 x$

$? 4 x = 10$

$? x = 2.5$ km/hr