circumference = pi*diameter so diameter = circumference/pi = 19.1 metres.
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A circle with a radius of 30 meters has an area of 2827.43 square meters.
diameter = 60/pi
The approximate area of a circle with a diameter of 60 centimeters is 2,827.43 square centimeters.
A circle with a circumference of 60 feet has a diameter of: 19.1 feet
CIRCUMFERENCE (C) OF A CIRCLE IS PI TIMES DIAMETER (D). THEREFORE BY SUBSTITUTION D = D (60) ÷ PI WHICH IS 19.09859317 (ROUNDED TO 19.1). DIAMETER OF CIRCLE = 19.1 cm.