1) Luas permukaan = π x r (r+s)
= 22/7 x 14 (14+21)
= 44 x 36 = 1584 cm²
2) Luas permukaan = π x r (r+s)
= 3,14 x 10 (10+10)
= 31,4 x 20 = 628 cm²
3) luas permukaan bola = 4 x π x r²
= 4 x 22/7 x 7 x 7 = 616 cm²
4) luas permukaan bola = 4 x π x r²
= 4 x 3,14 x 10 x 10 = 1256 cm²
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1) Luas permukaan = π x r (r+s)
= 22/7 x 14 (14+21)
= 44 x 36 = 1584 cm²
2) Luas permukaan = π x r (r+s)
= 3,14 x 10 (10+10)
= 31,4 x 20 = 628 cm²
3) luas permukaan bola = 4 x π x r²
= 4 x 22/7 x 7 x 7 = 616 cm²
4) luas permukaan bola = 4 x π x r²
= 4 x 3,14 x 10 x 10 = 1256 cm²