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= l.lingkaran + l. selimut
= πr² + 2πrt
= 22/7 x 7 x 7 + 2 x 22/7 x 7 x 10
= 154 + 440
= 594 cm²
= phi. r (r + 2t)
= 22/7 . 7 (7 + 2.10)
= 22(27)
= 594 cm^2