<h3>Volume of solids</h3><ul><li>Cube: <code>V = s³</code>; Cuboid: <code>V = l x w x h</code></li><li>Prism: <code>V = cross-section area x length</code></li><li>Cylinder: <code>V = πr²h</code></li><li>Pyramid: <code>V = ⅓ x base area x height</code>; Cone: <code>V = ⅓πr²h</code></li><li>Sphere: <code>V = ⁴⁄₃πr³</code></li></ul><h3>Volume and capacity</h3><p><strong>Capacity</strong> is how much a container holds. The key conversion is <code>1000 cm³ = 1 litre</code> and <code>1 m³ = 1000 litres</code>.</p><div class="callout"><strong>Kenyan context:</strong> A cylindrical water tank on a Machakos homestead has radius 1 m and height 2 m. Its volume is <code>πr²h = 3.142 x 1 x 1 x 2 ≈ 6.284</code> cubic metres, which is about <code>6284</code> litres of water for the dry season. A 20-litre jerrican equals <code>20000 cm³</code> of paraffin.</div>