Aptitude - Boats and Streams - Discussion

Discussion Forum : Boats and Streams - General Questions (Q.No. 5)
5.
In one hour, a boat goes 11 km/hr along the stream and 5 km/hr against the stream. The speed of the boat in still water (in km/hr) is:
3 km/hr
5 km/hr
8 km/hr
9 km/hr
Answer: Option
Explanation:

Speed in still water = 1 (11 + 5) kmph = 8 kmph.
2

Video Explanation: https://youtu.be/KQX_mA3tcVA

Discussion:
39 comments Page 4 of 4.

Rz reddy said:   8 years ago
Downstream(D).
Upstream so(U).
D+U = 11.
D-U = 5.
2D = 16.
D = 16/2.
D = 8km/hr.
(1)

Ramachandran said:   1 decade ago
Hello guys how would you find:

11 km/hr is Downstream.
5 km/hr is Upstream.

Priya said:   10 years ago
What is this? Am not clear, I am late pick up person, say clearly guys.

Satish said:   8 years ago
D=11 U=5.
(D+U)/2=x.
11+5/2=X.
16/2=X.
8=X (stream speed).

Vinau said:   7 years ago
X+Y=11,
X-Y=5,
X+Y+X-Y=11 + 5,
2X=16.

Then, X=8.
(31)

Shandeepsamy said:   7 years ago
Where this 1/2 came from? Please explain.
(3)

Ashok said:   1 decade ago
From where do this 1/2 came from?

Mina said:   1 decade ago
What is u and v?

Vinayak shelke said:   6 months ago
8 is the answer.


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