What is the fraction equivalent of the repeating decimal 0.2 (with the line on top of the 2)

With math question will mark brainliest question in the pic.

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

What is the solution to the equation below? 3/x-2+6=square root x-2 +8