(C) Efficiency of pipe $A = 1/6$ tank per hour.Efficiency of pipe $B = 1/8$ tank per hour.Combined efficiency of pipe $A$ and $B = (1/6 + 1/8) = (4+3)

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(C) Efficiency of pipe $A = 1/6$ tank per hour.Efficiency of pipe $B = 1/8$ tank per hour.Combined efficiency of pipe $A$ and $B = (1/6 + 1/8) = (4+3)/24 = 7/24$ tank per hour.In $2$ hours,the work done by both pipes $= 2 \times (7/24) = 7/12$ tank.Remaining tank to be filled $= 1 - 7/12 = 5/12$ tank.Pipe $B$ fills $1/8$ tank in $1$ hour.Time taken by pipe $B$ to fill $5/12$ tank $= (5/12) / (1/8) = (5/12) \times 8 = 40/12 = 10/3 = 3 \frac{1}{3}$ hours.

Competitive Quantitative Aptitude Pipes and Cistern Pipes and Cistern

Medium

Pipe $A$ can fill an empty tank in $6$ $hours$ and pipe $B$ in $8$ $hours$. If both the pipes are opened and after $2$ $hours$ pipe $A$ is closed,how much time will pipe $B$ take to fill the remaining tank?

A
$2 \frac{1}{3}$
B
$7 \frac{1}{2}$
C
$3 \frac{1}{3}$
D
$2 \frac{2}{5}$

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Pipes and Cistern

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Pipes and Cistern

Two pipes $A$ and $B$ can fill a tank in $20$ $minutes$ and $30$ $minutes$ respectively. If both the pipes are used together,then how long will it take to fill the tank? (in $minutes$)

Easy

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$A$ tap takes $36$ hours extra to fill a tank due to a leakage equivalent to half of its inflow. In how many hours can the inlet pipe alone fill the tank?

Easy

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$A$ pump can fill a tank with water in $2$ $hours$. Because of a leak,it took $2 \frac{1}{3}$ $hours$ to fill the tank. The leak can drain all the water of the tank in (in $hours$)?

Medium

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Two pipes $A$ and $B$ can fill a tank in $24$ $minutes$ and $32$ $minutes$ respectively. If both the pipes are opened simultaneously,after how much time (in $minutes$) should $B$ be closed so that the tank is full in $18$ $minutes$?

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Pipes $P$ and $Q$ can fill a tank in $10$ and $12$ $h$, respectively, and pipe $C$ can empty it in $6$ $h$. If all the three are opened at $7$ $am$, at what time will one-fourth of the tank be filled?

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Pipe $A$ can fill an empty tank in $6$ $hours$ and pipe $B$ in $8$ $hours$. If both the pipes are opened and after $2$ $hours$ pipe $A$ is closed,how much time will pipe $B$ take to fill the remaining tank?

Similar Questions

Two pipes $A$ and $B$ can fill a tank in $20$ $minutes$ and $30$ $minutes$ respectively. If both the pipes are used together,then how long will it take to fill the tank? (in $minutes$)

$A$ tap takes $36$ hours extra to fill a tank due to a leakage equivalent to half of its inflow. In how many hours can the inlet pipe alone fill the tank?

$A$ pump can fill a tank with water in $2$ $hours$. Because of a leak,it took $2 \frac{1}{3}$ $hours$ to fill the tank. The leak can drain all the water of the tank in (in $hours$)?

Two pipes $A$ and $B$ can fill a tank in $24$ $minutes$ and $32$ $minutes$ respectively. If both the pipes are opened simultaneously,after how much time (in $minutes$) should $B$ be closed so that the tank is full in $18$ $minutes$?

Pipes $P$ and $Q$ can fill a tank in $10$ and $12$ $h$, respectively, and pipe $C$ can empty it in $6$ $h$. If all the three are opened at $7$ $am$, at what time will one-fourth of the tank be filled?

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