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= 24,2 - 2,1 - 2,1
= 20 cm
L. Permukaan bola
= 4×22/7×2,1×2,1
= 88×0,63
= 55,44 cm^2
L. Permukaan selimut tabung
= 2 × 22/7 × 2,1 × 20
= 44 × 6
= 264 cm^2
L. Gabungan
= 55,44 + 264
= 319,44 cm^2
Sekian dan terima kasih