Three pipes P, Q and R can fill a tank in 6 hours. After running all three together for 2 hours, R is closed and P and Q can fill the remaining part in 7 hours. The number of hours taken by R alone to fill the tank is ---

A 10
B 12
C 14
D 16

Correct Answer: 14

P,Q এবং R একত্রে 6 ঘণ্টায় পূর্ণ করে 1টি tankP,Q এবং R একত্রে 2 ঘণ্টায় পূর্ণ করে <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>6</mn></mfrac><mo> = </mo><mfrac><mn>1</mn><mn>3</mn></mfrac></math> অংশ⸫ অবশিষ্ট থাকে <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfenced><mrow><mn>1</mn><mo> - </mo><mfrac><mn>1</mn><mn>3</mn></mfrac></mrow></mfenced><mo> = </mo><mfrac><mn>2</mn><mn>3</mn></mfrac></math> অংশP এবং Q একত্রে 7 ঘণ্টায় পূর্ণ করে <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mn>3</mn></mfrac></math> অংশP এবং Q একত্রে 1 ঘণ্টায় " " <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>2</mn><mrow><mn>7</mn><mo>&#xD7;</mo><mn>3</mn></mrow></mfrac><mo> = </mo><mfrac><mn>2</mn><mn>21</mn></mfrac></math> অংশP,Q এবং R একত্রে 1 ঘণ্টায় পূর্ণ করে tank - এর <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>6</mn></mfrac></math> অংশ⸫ R একা 1 ঘণ্টায় পূর্ণ করে <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfenced><mrow><mfrac><mn>1</mn><mn>6</mn></mfrac><mo> - </mo><mfrac><mn>2</mn><mn>21</mn></mfrac></mrow></mfenced><mo> = </mo><mfrac><mrow><mn>7</mn><mo> - </mo><mn>6</mn></mrow><mn>42</mn></mfrac><mo> = </mo><mfrac><mn>1</mn><mn>14</mn></mfrac></math> অংশ R একা <math xmlns = "http://www.w3.org/1998/Math/MathML"><mfrac><mn>1</mn><mn>14</mn></mfrac></math> অংশ পূর্ণ করে 1 ঘণ্টায়⸫ R একা 1 বা সম্পূর্ণ অংশ পূর্ণ করে 14 ঘণ্টায়।
Bissoy MCQ
#গণিত #নল ও চৌবাচ্চা (Pipes and cistern) #Standard Bank Ltd #Standard Bank Ltd - Management Trainee Officer - 22.01.2016

Related Questions

Three pipes P, Q and R can fill a tank in 6 hours. After working all three together for 2 hours, R is closed and P and Q can fill the remaining part in 7 hours. The number of hours taken by R alone to fill the tank is-
A 10
B 12
C 14
D 16
Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours. C is closed and A and B can fill the remaining part in 6 hours. The number of hours taken by C alone to fill the tank is:
A 8 hours
B 10 hours
C 14 hours
D 18 hours
Three pipes P,Q and R can fill a tank in 6 hours. After working all three together for 2 hours. R is closed and P and Q can fill the remaining part in 7 hours . The number of hours taken by R alone fill the thank is --
A 10
B 12
C 14
D 16
The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If the maximum number of valves that can be closed at the same time are closed which of the following must true?
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A tank is fitted with 8 pipes, some of them that fill the tank and others that are waste pipe meant to those that empty the tank can empty it in 6 hours. If all the pipes are kept open when the tank is full, it will take exactly 6 hours for the tank to empty. How many of these are these are fill pipes?
A 2
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The mixing vat in a factory receives liquid ingredients through six separate value--- labeled R.S.T.U,Y and Z -- each of which has exactly two settings: open and closed.The mixing vat operator must ensure that each valve is set open or closed according to the following conditions: If T is open, both S and Z must be closed, R and Z cannot both be closed at the same time; If Y is closed, Z must also be closed;S and U cannot both be open at the same time. If R is closed and U is open, which of the following must be true?
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A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same time during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is:
A 6 hours
B 10 hours
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Three pipes can independently fill a water tank in 10,12 and 15 hours. How many hours will it take for all three pipes opened together to fill half of the tank?
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B 5
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Two pipes can fill a tank in 20 and 24 minutes respectively and a waste pipe can empty 3 gallons per minute. All the three pipes working together can fill the tank in 15 minutes. The capacity of the tank is ----
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Pipe A alone can fill a tankin 8 hours .Pipe B can fill it in 6 hours . If both the pipes are operated and after 2 hours pipe A is closed, then the other pipe will fill the tank in.
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