A rectangular tank with 5 identical metal cubes was filled to the brim with water. The Water was drained out of the tank through a tap at a rate of 2 litres per minute. It took 18 minutes for the water level to drop to the height of the metal cubes. Find the volume of the 5 metal cubes. The measurement of the tank is 60cm by 20cm by 40cm.
Drop in height per minute = 2000/(60X20) = 1.67cm
Drop in height in total = 1.67 X 18 = 30cm
Height of cube = 10cm
Vol of 1 cube = 10X10X10 = 1000cm3
Vol of 5 cubes = 1000 X 5 = 5000cm3