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Hoses P and T simultaneously fill an empty swimming pool that has a ca

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Math Expert
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Joined: 02 Sep 2009
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Hoses P and T simultaneously fill an empty swimming pool that has a ca  [#permalink]

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New post 17 Mar 2017, 03:03
00:00
A
B
C
D
E

Difficulty:

  5% (low)

Question Stats:

91% (00:48) correct 9% (01:16) wrong based on 75 sessions

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Hoses P and T simultaneously fill an empty swimming pool that has a capacity of 45,000 liters. If the flow in each hose is independent of the flow in the other hose, how many hours will it take to fill the pool?

(1) Hose P alone would take 28 hours to fill the pool.
(2) Hose T was turned on an hour later than hose P.

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Re: Hoses P and T simultaneously fill an empty swimming pool that has a ca  [#permalink]

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New post 17 Mar 2017, 07:59
Bunuel wrote:
Hoses P and T simultaneously fill an empty swimming pool that has a capacity of 45,000 liters. If the flow in each hose is independent of the flow in the other hose, how many hours will it take to fill the pool?

(1) Hose P alone would take 28 hours to fill the pool.
(2) Hose T was turned on an hour later than hose P.



no info about rate of T
hence combined also insuff

Ans E
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Re: Hoses P and T simultaneously fill an empty swimming pool that has a ca  [#permalink]

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New post 17 Mar 2017, 09:16
1) You have no information on Hose T so 1 is insufficient
2) You have no information on Hose T or P so insufficient

Combine 1 &2, still insufficient.

Therefore the answer is E
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Re: Hoses P and T simultaneously fill an empty swimming pool that has a ca  [#permalink]

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New post 27 Aug 2018, 08:58
Capacity 45,000l
We need to know the rate of P+T
1. A rate of P, but we do not know the rate of T - UNSUFF
2. We do not know the rate of T – UNSUFF
1-2 still we do not have the rate of T – UNSUFF
E

P.S. For DS work-rade / distance –rate question, you do not need to waste your time doing this example, just take a look what current examples are asking you for and what sort of information is giving to you
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Re: Hoses P and T simultaneously fill an empty swimming pool that has a ca   [#permalink] 27 Aug 2018, 08:58
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Hoses P and T simultaneously fill an empty swimming pool that has a ca

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