Tolong di bantu kak nomor 6 sama 7 nya ​

6. Jari-jari

r = d/2

= 14/2

= 7 cm

Luas permukaan tabung

Lp = 2 × Luas alas + Luas selimut

= 2πr² + 2πrt

= (2 × 22/7 × 7²) + (2 × 22/7 × 7 × 10)

= (44 × 7) + (44 × 10)

= 44(7 + 10)

= 44(17)

= 748 cm²

7. Garis pelukis

s = √(r² + 12²)

= √(5² + 12²)

= √(25 + 144)

= √169

= 13 cm

Luas permukaan kerucut

Lp = Luas alas + Luas selimut

= πr² + πrs

= (3,14 × 5²) + (3,14 × 5 × 13)

= (3,14 × 5)(5 + 13)

= (15,7)(18)

= 282,6 cm²

Semoga membantu 🙂