Giúp mình nhanh với ạ

`V_{\text{nước}} = \pi \int_{0}^{1.5} ( \frac{4}{7}x^3 - \frac{5}{4}x^2 + \frac{5}{7}x + \frac{3}{4} )^2 dx`

`\int_{0}^{1.5} ( \frac{4}{7}x^3 - \frac{5}{4}x^2 + \frac{5}{7}x + \frac{3}{4} )^2 dx \approx 1.05436`

`V_{\text{nước}} \approx \pi \cdot 1.05436 \approx 3.31298 \text{ (lít)}`

`->` `V_{\text{nước}} \approx \mathbf{3.31} \text{ lít}`