Luas permukaan tabung
π x d ( r + t )
3,14 x 75 ( 37,5 + 25 )
235,5 ( 62,5 )
14.718,75 cm²
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Luas permukaan tabung
π x d ( r + t )
3,14 x 75 ( 37,5 + 25 )
235,5 ( 62,5 )
14.718,75 cm²