the difference between circumference and diameter of a circle is 21.4 find the radius of the circle
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Step-by-step explanation:
r=d/2
21.4/7=10.7
Circumference - diameter = 21.4 cm
2πr−2r=21.4
2r(π−1)=21.4
r=21.4/2(22/7-1)
21.4*7/2*15
149.8/30
4.99
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