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BossaNova · Answer 1 · 2018-03-02T23:32:35+0000

circumference of the circle: 2π.r = 2π.7= 14π = 43.98
area of the circle: π.r² = 49.π

if area is tripled π.r² = 3x49xπ → r² = √147
if r =√147 , then circumference = 2π√147 = 76.18

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