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C = 360/60 x 40 = 240 cm
2 π r = 240
r = 120 / π = 7 x 120 / 22 = 7 x 60/11 = 420/11 cm
r = 38•18 cm
Circumference = c
Radius = r
c = pi*2r = 40*6 = 240
2r = 240/pi
r = 120/pi = 38.20
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C = 360/60 x 40 = 240 cm
2 π r = 240
r = 120 / π = 7 x 120 / 22 = 7 x 60/11 = 420/11 cm
r = 38•18 cm
Circumference = c
Radius = r
c = pi*2r = 40*6 = 240
2r = 240/pi
r = 120/pi = 38.20