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# An empty tank has a capacity of 5000 litres. Two pipes A and B

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Manager
Status: The journey is always more beautiful than the destination
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Location: India
Concentration: Statistics, Strategy
GMAT 1: 570 Q40 V28
GPA: 3.14
An empty tank has a capacity of 5000 litres. Two pipes A and B  [#permalink]

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07 Apr 2018, 02:54
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1
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Difficulty:

45% (medium)

Question Stats:

53% (01:02) correct 47% (01:11) wrong based on 40 sessions

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An empty tank has a capacity of 5000 litres. Two pipes A and B are opened simultaneously will the tank takes more than 500 minutes to fill?

(1) A can fill the tank at 5 litres/ min
(2) B can fill the tank at 10 litres/min

Source: Time4Education

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GMAT 1: 740 Q50 V40
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Re: An empty tank has a capacity of 5000 litres. Two pipes A and B  [#permalink]

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07 Apr 2018, 03:36
Nixondutta wrote:
An empty tank has a capacity of 5000 litres. Two pipes A and B are opened simultaneously will the tank takes more than 500 minutes to fill?

(1) A can fill the tank at 5 litres/ min
(2) B can fill the tank at 10 litres/min

Source: Time4Education

5000 L is capacity. When both A & B are opened simul, will the tank take more than 500 mins to fill is the Q.

(1) A fills @ 5L/min ... so for 5000L -> A takes 1000 mins. Not suff as we do not know what is the rate of B with this info.

(2) B fills @ 10L/min ... so for 5000L -> B takes 500 mins. Sufficient! even if A is not used , the whole tank will not take more than 500 mins to fill up. So our answer is always "YES".

Hence Option (B) is our answer.

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Joined: 30 Mar 2017
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Re: An empty tank has a capacity of 5000 litres. Two pipes A and B  [#permalink]

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07 Apr 2018, 08:26
Nixondutta wrote:
An empty tank has a capacity of 5000 litres. Two pipes A and B are opened simultaneously will the tank takes more than 500 minutes to fill?

(1) A can fill the tank at 5 litres/ min
(2) B can fill the tank at 10 litres/min

Source: Time4Education

I think the answer should be C because when each statement is taken alone, we do not know whether the other pipe is inward flowing or outward flowing. E.g. if we look at Statement 2 alone, we're given that B can fill tank at 10L/min but we're not told anything about A. What if A can drain tank at 10L/min?
Re: An empty tank has a capacity of 5000 litres. Two pipes A and B   [#permalink] 07 Apr 2018, 08:26
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# An empty tank has a capacity of 5000 litres. Two pipes A and B

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