This is a Science question pls help give 15 coins for answer

Conservation: using less water

Xeriscaping: replanting your yard with plants that do not require great amounts of water

Desalination: process of removing salt from water so that it can be used for consumption

Water Budget: finite amount of usable water available

Potable: water that is safe to use a drink

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

3. dark matter

empty space could also be a simple vacuum