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4.400 = 22/7 x r² x 14
4.400 = 44 x r²
r² = 4.400 : 44
r²=100
r² = 10 x 10
r = 10 cm
T = 14 cm
v = × × t
4.400 = × × 14
4.400 = 44 ×
=
= 100
r =
r = 10 cm