A cylindrical container lying on its side, whose circular cross section is $6$ ft in diameter and whose length is $\backslash (10\backslash$mathrm$\{$ft$\}\backslash ).$ The cylinder has a water level equal to $"$ h $"$ which is the height above the ground. It has a $1-$inch diameter hole at the bottom on the side of the tank.

$1.$ If the tank starts out full, how long will it take for the tank to empty?

$2.$ If the tank starts out full, how long will it take for the tank to reach $\backslash (3/4\backslash$mathrm$\{$~h$\}\backslash )?$