A sailor goes 8 km downstream in 40 minutes and come back in one hour. what is speed of the sailor in still water and speed of current.
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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 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 kmph
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