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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,
?
5
-
x
4
0
?
=
5
+
x
3
×
4
0
?
?
5
+
x
=
1
5
-
3
x
?
4
x
=
1
0
?
x
=
2
.
5
km/hr
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