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= 2 * 22/7 * 14(14 +40)
= 88 * 54
= 4752 cm²
t = 40 cm
dit : L.p.t
jawab:
L.p.t = 2πr ( r+t )
= 2. 22/7 . 14 ( 14 + 40 )
= 88 . 54
= 4752 cm²