Area of a circle with a diameter of 4.9m = pi*2.452 = 18.857 square m to 3 d.p.
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The GCF is 7.
The area of a circle with a diameter of 9.4 m is: 69.4 m2
A diameter is a line, and has no area.A circle whose diameter is 8.5 has an area of 56.745. (rounded)
The diameter = sqrt (area*4/Pi) = 15.6353
Divide the area by pi (= 3.14159 approx) to get diameter.