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Verified answer
Volume = π x r² x t2.156 cm³ = 22/7 x r² x 14 cm
2.156 cm³ = 44 cm x r²
r² = 2.156 : 44
r² = 49
r = √49
r = 7 cm
Luas permukaan tabung
= 2 x π x r ( r + t )
= 2 x 22/7 x 7 cm ( 7 cm + 14 cm )
= 44 cm x 21 cm
= 924 cm³