Pipes p can fill a tank in 36 hours and pipe 'q' can fill a tank in 45 hours.if both the pipe are opened simultaneously.the how much time will be taken to fill this tank ?
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Pipe P in 1 hour can fill 1/36 of the tank
Pipe Q in 1 hour can fill 1/45 of the tank
In 1 hour P & Q fill: 1/36 + 1/45 = 9/180 = 1/20 part
Hence 1 part(full tank) will be filled in 20 hours.
Hope this helps
Pipe Q in 1 hour can fill 1/45 of the tank
In 1 hour P & Q fill: 1/36 + 1/45 = 9/180 = 1/20 part
Hence 1 part(full tank) will be filled in 20 hours.
Hope this helps
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