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Bunuel
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 22 Apr 2020, 05:42
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C
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95% (hard)

Question Stats:

45% (02:43) correct 55% (02:55) wrong based on 141 sessions

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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at the rate of 25 lit/min, and pipe C drains a tank at the rate of 50 lit/min. First pipe A is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed, after that pipe C is opened for 1 minute and then closed. If this continues till a 7000-litre empty tank is filled to the capacity, how long will it take to fill the tank ?

A. 275 minutes
B. 276 minutes
C. 277 minutes
D. 278 minutes
E. 279 minutes


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C
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 22 Apr 2020, 13:28
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Total water filled in 1 such cycle or 3 minutes = 100+25-50 = 75 liter

Total water filled in 91 such cycle or 273 minutes (Go close to given options) = 75*91 = 6825 liters

(7000-6825>125; one more cycle is possible)

Total water filled in 92 such cycle or 276 minutes (Go close to given options) = 6825+75= 6900 liters

Now open pipe A for 1 more minute and we'll get 6900+100=7000 liters water in tank

C






Bunuel
Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at the rate of 25 lit/min, and pipe C drains a tank at the rate of 50 lit/min. First pipe A is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed. If this continues till a 7000-litre empty tank is filled to the capacity, how long will it take to fill the tank ?

A. 275 minutes
B. 276 minutes
C. 277 minutes
D. 278 minutes
E. 279 minutes


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ogmega
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 23 Apr 2020, 16:29
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Bunuel what about pipe C ?
there is no information if its open or close. Please check the question?
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 23 Apr 2020, 19:31
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Bunuel
Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at the rate of 25 lit/min, and pipe C drains a tank at the rate of 50 lit/min. First pipe A is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed. If this continues till a 7000-litre empty tank is filled to the capacity, how long will it take to fill the tank ?

A. 275 minutes
B. 276 minutes
C. 277 minutes
D. 278 minutes
E. 279 minutes


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Is pipe B which is written after pipe B is actually pipe C?

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Bunuel
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 24 Apr 2020, 00:18
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gurmukh
Bunuel
Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at the rate of 25 lit/min, and pipe C drains a tank at the rate of 50 lit/min. First pipe A is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed, after that pipe B is opened for 1 minute and then closed. If this continues till a 7000-litre empty tank is filled to the capacity, how long will it take to fill the tank ?

A. 275 minutes
B. 276 minutes
C. 277 minutes
D. 278 minutes
E. 279 minutes


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Is pipe B which is written after pipe B is actually pipe C?

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Yes. Fixed the typo. Thank you.
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 24 Apr 2020, 00:53
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Tank filled in 3 minutes = 100+25-50=75
In 276 minutes or 92 cycles = 92×75 =6900 lts
In next 1 minute 100 more litres will be added so total 277 minutes. Option C is the answer.

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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 25 Apr 2020, 09:11
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Net work done : 100+25-50 = 75L in 3 mins
Remaining capacity to be filled : 7000-75=6925 L
75l - 3mins
6925l in -?

Answer : C
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Pipe A fills a tank at the rate of 100lit/min, Pipe B fills a tank at 17 Sep 2024, 11:06
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Hello from the GMAT Club BumpBot!

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