Robert has bought some land, and plans to plant vegetable which will need to be watered everyday in the summer. The water used to irrigate the land is from a well. A pond is needed to store the water. He has an old pump which has a volume flow rate of 20 L/s.

Known:

• Robert will plant 45 acres of vegetables. It is estimated that each acre needs 2,000 liters of water per day.

• How big is the pond?
• Determine how long the pump will be operated daily.

• Consider the water in the pond as a system.
• The water stored in the pond equals Δm_system of the filling process.
• At 30 ^oC and 1 atm, ρ_water = 996 kg/m³