Dik : Jari-jari alas = 20 cm
Panjang selimut = 21 cm
Dit : Luas permukaan = ?
Jwb : Luas permukaan = πr(r+s) ⇒ 3,14 x 20(20+21) = 62,8 x 41 = 2574,8 cm²
Semoga membantu :)
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dit luas permukaan
dij: πr(r + s)
22/7.10(10 +21)
22/7 x 10 x 31
68200/7=9.742
Dik : Jari-jari alas = 20 cm
Panjang selimut = 21 cm
Dit : Luas permukaan = ?
Jwb : Luas permukaan = πr(r+s) ⇒ 3,14 x 20(20+21) = 62,8 x 41 = 2574,8 cm²
Semoga membantu :)