Answer:
The amount of water she poured out of the tank is 27,000 m³.
Step-by-step explanation:
To answer the question, we take the dimensions of the tank as
Width = 0.5 m
Length = 0.2 m
Height = 1 m
Therefore, if the tank was was filled to 2/3 of the volume, then we have
Volume of water in the tank = 2/3 × 0.5 m × 0.2 m × 1 m
= 0.067 m³
She then poured out water until the tank was 2/5 full. That is
2/5 × 0.5 m × 0.2 m × 1 m = 0.04 m³
Therefore, the amount of water she poured out of the tank is
0.067 m³ - 0.04 m³ = 0.027 m³
However, 1 m³ = 1 × 10⁶ mm³
Therefore 0.027 m³ = 27,000 mm³
The amount of water she poured out of the tank = 27,000 m³.
