My mom told me that this is the way i do this, is this answer right

Water flows at a steady rate from a tap. its takes 40 seconds to fill a 4 litre watering can from the tap. the rate at which water flows from the tap is halved. complete: 4 litres into cm3

If i have 20$ and i gave 5$ away how much i got

The sum of these consecutive integers is equal to 9 less than 4 times the least of the integer. find the three integers