A motorboat goes down stream and covers the distance between X and Y in 4hours while it covers the same distance upstream in 6hours. if the speed of the stream is 3km/hours then find the speed of boat in still water.
Answers
Answered by
1
Answer:
Let the distance between two port be
′
x
′
km.
And speed of boat in still water be
′
S
′
km/hr.
According to question,
In downstream,
x=(S+2)x4 ........(1) as, (Distance= Speed x Time)
Similarly,
In upstream,
x=(S−2)x5 ........(2)
From (1) & (2),
(S+2)4=(S−2)5
=> 4S+8=5S−10
=> S=18 km/hr.
Answered by
2
Answer:
Let the distance between two port be
′
x
′
km.
And speed of boat in still water be
′
S
′
km/hr.
According to question,
In downstream,
x=(S+2)x4 ........(1) as, (Distance= Speed x Time)
Similarly,
In upstream,
x=(S−2)x5 ........(2)
From (1) & (2),
(S+2)4=(S−2)5
=> 4S+8=5S−10
=> S=18 km/hr.
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