下图显示了一个装有 1500 cm$^3$ 水的长方体水箱。 求水箱中水面的高度。

1. Calculate the base area of the rectangular tank

$\text{Base Area} = \text{Length} \times \text{Width} = 30 \text{ cm} \times 10 \text{ cm} = 300 \text{ cm}^2$

2. Calculate the height of the water level in cm

$\text{Height} = \frac{\text{Volume}}{\text{Base Area}} = \frac{1500 \text{ cm}^3}{300 \text{ cm}^2} = 5 \text{ cm}$

3. Convert the height from cm to m to match the options

$5 \text{ cm} = \frac{5}{100} \text{ m} = 0.05 \text{ m}$