royalldhirendra36 royalldhirendra36

06-07-2022
Mathematics

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a) The difference between the circumference and the diameter of a circle is 90cmFind the radius of the circle

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jsimpson11000 jsimpson11000

06-07-2022

Answer:

r=21.01 cm

Step-by-step explanation:

2r = diameter

Circumference of a circle = pi 2r

difference = 90

pi2r - 2r =90

2r (pi-1) =90

90/(2(pi-1) = r = 21.01 cm

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