Final answer:
To find the weight of the combined system, calculate the mass of the water in the tank and add it to the mass of the tank.
Step-by-step explanation:
To determine the weight of the combined system, we need to find the mass of the water in the plastic tank. The volume of the tank is given as 0.2 m³ and the density of water is given as 1000 kg/m³. We can calculate the mass of the water by multiplying its volume and density:
Mass of water = Volume of water * Density of water
Mass of water = 0.2 m³ * 1000 kg/m³ = 200 kg
The weight of the combined system is equal to the mass of the tank plus the mass of the water:
Weight of combined system = Mass of tank + Mass of water
Weight of combined system = 3 kg + 200 kg = 203 kg