The capacity of a bowl can be obtained by calculating its volume. First, we need to know whether the bowl is cylindrical or other shapes. The volume of a cylinder can be calculated by the formula V = πr^2h, where V is the volume, π is the pi (about equal to 3. 14 159), R is the radius and H is the height.

Because the caliber is the diameter, we can divide the caliber by 2 to get the radius: radius = 20cm/2 = 10cm, and then substitute these values into the formula to calculate: v = 3.14159 * (10cm) 2 * 8.7cm 𕛠 20.