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=
3969 =
r =
r = 63
diameter = 2r
d = 2 . 63
d = 126
= √(12474 x 7 ÷ 22) x 2
= √(87318 ÷ 22) x2
= √(3969) x2
= √7938
= 89.09 cm
maaf kalo salah