Sebuah tabung mempunyai diameter 20 cm dan tinggi 15 cm. Luas selimut tabung tersebut adalah
Luas Selimut Tabung
= 2πrt
= 2 × 3,14 × (20 ÷ 2) × 15
= 30 × 3,14 × 10
= 30 × 31,4
= 942 cm
100 Endgames You Must Know: Vital Lessons for Every Chess Player
100 Endgames You Must Know: Vital Lessons for Every Chess Player
= 2πrt
= 2 × 3,14 × (20 ÷ 2) × 15
= 30 × 3,14 × 10
= 30 × 31,4
= 942 cm