Ononot — A tank is filled by Pipe A in 4.5 hours and emptied by Pipe

Guest Session: 1 Question Remaining. Create Account to save progress.

Fractions & Decimalshard

0:00.0

A tank is filled by Pipe A in $4.5$ hours and emptied by Pipe B in $6.75$ hours. If both are open, how long to fill the tank?