1.5 A basic geometrical shape with a circular base. 1.2.1 What kind of three-dimensional shape does the tank represent?

The diameter $D = 2.4 \text{ M}$.

$$
r = \frac{2.4 \text{ M}}{2}
$$
$$
r = \boxed{\text{1.2 M}}
$$

Given $r = 1.2 \text{ M}$ and $\pi = 3.14$.

$$
C = 2 \times 3.14 \times 1.2 \text{ M}
$$
$$
C = 6.28 \times 1.2 \text{ M}
$$
$$
C = \boxed{\text{7.536 M}}
$$

Given radius $r = 2 \text{ m}$.  
Given height $h = 300 \text{ cm}$. Convert height to meters:
$$
h = 300 \text{ cm} \times \frac{1 \text{ m}}{100 \text{ cm}} = 3 \text{ m}
$$
Use $\pi = 3.14$.

$$
V = 3.14 \times (2 \text{ m})^2 \times 3 \text{ m}
$$
$$
V = 3.14 \times 4 \text{ m}^2 \times 3 \text{ m}
$$
$$
V = 3.14 \times 12 \text{ m}^3
$$
$$
V = \boxed{\text{37.68 m}^3}
$$