Question

Running the water while you brush your teeth can consume another liter. How much water can you save in a week by turning it off

Answer 1

21 liters of water

Explanation:

Let's say if you consume 2 liters of water when you run the tap and brush at the same time.

Also when you don't run the tap while you brush, you only use 0.5ilters

Now assuming you brush at least twice a day, this alone shows that you will use 0.5x2= 1L

Instead of 2x2= 4l.

Hence, in one day you will save 4-1= 3L

Therefore for a week you will save

3x7= 21 liters of water