Question

Can someone help me pls

Answer 1

`V_{\text{water}}=V_{\text{aquarium}}-V_{\text{cube}}\\\\V_{\text{aquarium}}=10\text{ in}\cdot5 \text{ in}\cdot15\text{ in}=750\text{ in}^3\\\\V_{\text{cube}}=(3\text{ in})^3=27\text{ in}^3\\\\V_{\text{water}}=750\text{ in}^3-27\text{ in}^3=723\text{ in}^3`