As the area of the circle is proporcional of R^2...
(200/40)^2=5^2=25 times greater
The area of a circle with a diameter of 200 mm is approximately 25 times greater than that of a circle with a diameter of 40 mm. This is determined by using the formula for the area of a circle and calculating the ratio of their areas. Specifically, it involves dividing the area of the larger circle by the area of the smaller one, which reveals the factor of 25.
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