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4,4 dam = 10 x 2 x phi x r
4400 cm = 10 x 2 x 22/7 x r
4400 = 440/7 x r
r = 4400 x 7/440
r = 70 cm
10x=4400cm
1x=440cm
kll=440cm
2phi r=440
2×22/7×r=440
r=440×7/44
r=70cm