Answer :
The approximate diameter of the circular plate with circumference of 68.5 centimetre is 21.82 centimetres.
What is circumference of a circle?
The circumference of a circle is the perimeter of a circle. Therefore, the formula of a circle can be represented as follows:
circumference = 2πr
where
- r = radius
Therefore,
circumference = 68.5 cm
68.5 = 2 × 3.14 × r
r = 68.5 / 6.28
r = 10.9076433121
radius = 10.907
Diameter = 2(radius)
Diameter = 2 × 10.9076433121
Diameter = 21.8152866242
Diameter = 21.82 cm
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