A rectangular tank 40cm wide by 50 cm long by 30 cm high is filled up with water up to 2/3 of its height .water flows from a tap into the tank at a rate of 0.5 liter per minute. Find the amount of water in the tank after 30 minutes. Give your answer in liters

Answer 1

when the measurement started, the volume was 40*50*30 * 2/3 = 40000 cm^3 = 40L

Now add to that the incoming volume of
0.5L/min * 30min = 15L

Answer 2

Step 3 is 40+15=55 l