Qwizy BINGO - Related Rates Question #50

$Solve each related rate problem. A conical paper cup is $30\,cm$ tall with a radius of $10\,cm.$ The bottom of the cup is punctured so that the water level goes down at a rate of $3\,cm/sec.$ At what rate is the volume of water in the cup changing when the water level is $4\,cm?$$