The water level has risen to 100 in less than 30i seconds. At 30 seconds it is now at 200. Woah look at that when you got in the water level rose above 300 meters and the water has only been running for about 40 seconds.
Lets turn the faucet off now and see what happens.
Notice how the water does not rise or fall, that is because the plug is still in the drain. Now lets turn the water on and at 500 we will let your other two sisters get in the tub to see what happens with the water level. Oh no its over flowing we better shut of the faucet and see if that stops the tub from over flowing. Nope it did not work we are going to have to take the drain out now to see if the water will drain enough. Look it did the water level is now down to 450.