Question

Luas selimut tabung tanpa tutup adalah 256π cm2. perbandingan tinggi dan jari-jari tabung 2:1. volume tabung adalah,..

Answer 1

T : r = 2 : 1
t = 2r
Ls. ttt = 2πrt = 2πr(2r) = 4πr²
256π = 4πr²
r² = 256π/4π = 64
r = √64 = 8 cm
t = 2x8 = 16 cm
Volume = πr²t = 3,14 x 8² x 16 = 3.215,36 cm³