SOLUTION:
The area of the circle = 64 π m^2
The area of a circle = π x r^2
Then, π x r^2 = 64 π
we have that
r^2 = 64
square root both sides ,we have:
Radius = 8 m
Diameter = 2 x Radius = 2 x 8 m
= 16 m
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