Question 27465
1 person = 8.79x10^5 litres of water
2 people = 2x 8.79x10^5 litres of water
3 people = 3x 8.79x10^5 litres of water
4 people = 4x 8.79x10^5 litres of water

6x10^9 people = 6x10^9x 8.79x10^5 litres of water
--> 5.274x10^15 litres of water.


--> when stuck, start with an easy example and then spot the pattern.


jon.