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# A sailor goes 8km downstream in 40 minutes and returns in 1 hours Determine the speed of the sailor in still water and speed of the current?

Updated: 10/23/2022

Sal369

Lvl 1
10y ago

Let speed of stream = y kmph & speed of boat = x kmph

speed downstram((x + y)kmph) = 8 * 60 / 40 kmph

= 12 kmph

speed upstream((x - y) kmph) = 8/1 kmph

= 8 kmph

x + y = 12

x - y = 8

--------------

2x = 20,

2y = 4

x = 10,

y = 2

=>Speed of stream = 2 kmph, Speed of boat = 10 kmp

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Q: A sailor goes 8km downstream in 40 minutes and returns in 1 hours Determine the speed of the sailor in still water and speed of the current?
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