A rotating lawn sprinkler sprays water in a circular area of grass, as shown in the picture. The diameter of the circular area o
1 answer:
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The radius of B is 2.5cm.
<h3>What is a circle?</h3>A circle is the locus of points equidistant from a common point which is called the center of the circle.
Analysis:
Area of circle A = π/4 = π
/4 = 225π/4
Area of circle B = π
But A = 9B
225π/4 = 9 x π
= 225/36 = 25/4
r = = 5/2 = 2.5cm
Learn more about circle: brainly.com/question/24375372
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