What is the area of a sector of a circle with a radius of 2.0 ft and a central angle of 2/3 radians

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

92ft long and 48 wide resurface 2.75$

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great