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A boat moves from city X to city Y. What is the speed of the boat

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A boat moves from city X to city Y. What is the speed of the boat [#permalink]

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New post 31 Jul 2017, 20:49
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Question Stats:

61% (00:44) correct 39% (00:42) wrong based on 80 sessions

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A boat moves from city X to city Y. What is the speed of the boat in still water?

(1) Speed of the river current is 3 m/s

(2) The distance between city X and the boat is increasing at the rate of 2 m/s
[Reveal] Spoiler: OA

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Re: A boat moves from city X to city Y. What is the speed of the boat [#permalink]

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New post 31 Jul 2017, 21:00
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Gnpth wrote:
A boat moves from city X to city Y. What is the speed of the boat in still water?

(1) Speed of the river current is 3 m/s

(2) The distance between city X and the boat is increasing at the rate of 2 m/s



S1: No information about the speed of the boat so insufficient.

S2: This statement gives that the speed of the boat in the river including the speed of current is 2m/s. From this we can not find the speed of the boat in still water unless you have the speed of the river current. SO insufficient.

S1&S2 together : We can find the speed of the boat in still water by subtracting the speed of the current.

C is the answer

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Re: A boat moves from city X to city Y. What is the speed of the boat [#permalink]

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New post 16 Aug 2017, 02:33
This question seems wrong. We need to know whether the river's current is against the boat's direction or along it. The correct answer should be E

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Re: A boat moves from city X to city Y. What is the speed of the boat [#permalink]

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New post 16 Aug 2017, 08:42
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abhishek911 wrote:
This question seems wrong. We need to know whether the river's current is against the boat's direction or along it. The correct answer should be E

Question is correct.
Consider this scenario in which we are considering both statements and it is given the speed of current is 3 m/s and speed of boat is 2m/s.
If the river was flowing in the direction of movement of the boat, the speed of the boat cannot be less than 3m/s.
Hence, we conclude that the river current is in the opposite direction of movement of the boat.
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Re: A boat moves from city X to city Y. What is the speed of the boat [#permalink]

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New post 16 Aug 2017, 09:04
SaGa wrote:
abhishek911 wrote:
This question seems wrong. We need to know whether the river's current is against the boat's direction or along it. The correct answer should be E

Question is correct.
Consider this scenario in which we are considering both statements and it is given the speed of current is 3 m/s and speed of boat is 2m/s.
If the river was flowing in the direction of movement of the boat, the speed of the boat cannot be less than 3m/s.
Hence, we conclude that the river current is in the opposite direction of movement of the boat.


Got it. Thanks !


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Re: A boat moves from city X to city Y. What is the speed of the boat [#permalink]

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New post 22 Aug 2017, 03:04
SaGa wrote:
abhishek911 wrote:
This question seems wrong. We need to know whether the river's current is against the boat's direction or along it. The correct answer should be E

Question is correct.
Consider this scenario in which we are considering both statements and it is given the speed of current is 3 m/s and speed of boat is 2m/s.
If the river was flowing in the direction of movement of the boat, the speed of the boat cannot be less than 3m/s.
Hence, we conclude that the river current is in the opposite direction of movement of the boat.



Yes this explaination makes sense . Thanks !!

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Re: A boat moves from city X to city Y. What is the speed of the boat   [#permalink] 22 Aug 2017, 03:04
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