SOLUTION: pipe A alone can fill a tank in 8 hours. Pipe B can fill it in 6 hours. If both the pipes are opened and after 2 hours pipe A is closed,then the other tank will fill the tank in

Question 738269: pipe A alone can fill a tank in 8 hours.
Pipe B can fill it in 6 hours.
If both the pipes are opened and after 2 hours pipe A is closed,then the other tank will fill the tank in how many hours?
please give the right answer...
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
a) First we need to find out how fast both pipes fill the tank.
b) Then we need to find out how much both pipes fill the tank in 2 hours
c) Then we need to find out much more needs to be filled
d) Then we need to find out how long pipe B will need to complete the job.
a) 1/8+1/6=1/x
x=24/7= 3 3/7=x = 3.4286 hours
b) after 2 hours it has done 2/(24/7) =7/12 =58.33%
c) leaving 5/12
d) 5/12 *6 =5*6/12=2.5 hours for pipe b to complete the job.

RELATED QUESTIONS
An inlet pipe can fill a tank in 3 hours. An outlet pipe can empty the tank in 6 hours. (answered by Alan3354)

A pipe can fill a tank in 10 hours. If a second pipe is opened, the two pipes together... (answered by ewatrrr,josmiceli)

The fill pipe for a tank can fill the tank in 4 hours, and the drain pipe can drain it in (answered by ankor@dixie-net.com)

A milk tank can be filled by pip A in 6 hours, by pipe B in 8 hours and by pipe C in 12... (answered by mananth)

At 1 pm, Poseidon opened pipe A to fill an empty tank with water. Two hours later, Zeus... (answered by ankor@dixie-net.com)

One pipe can fill a tank in 6 hours, and another pipe can fill the same tank in 8 hours.... (answered by josmiceli)

Pipe M can fill a tank in 36 hours, and pipe N can fill it in a certain time. If both... (answered by stanbon)

Pipe A can fill a tank in 8 hours. When both A and pipe B are used th tank is filled in 5 (answered by ankor@dixie-net.com)

A tank can be filled in 18 hours by pipe A alone and in 22 hours by pipe B alone. How... (answered by mananth)