Multiply Pi (3.1416) by the diameter.
Thus, 3.1416 x 30 = 94.248in
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The circumference of a circle with diameter of 30 centimeters is: 94.2 cm (diameter x Pi = circumference).
The circumference of a circle 30 inches in diameter is 30*pi inches
Circumference = 30*pi feet
The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units. The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units. The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units. The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units.
A circumference of 94.2 units.