volume tabung adalah 11.704 cm³ jika tinggi tabung 19 cm maka panjang jari jari alasnya adalah

Bab Bangun Ruang

phi × r × r × t = V
22/7 × r^2 × 19 = 11.704
22/7 × r^2 =11.704/19
22/7 × r^2 = 616
r^2 = 616 × 7/22
r^2 = 196
r = 14 cm

Volume tabung = 11.704 cm^3
tinggi tabung = 19 cm

Volume tabung = phi × r × r × t
11.704 cm^3 = 3,14 × r^2 × 19 cm
11.704 cm^3 = 59,66 × r^2
11.704 cm^3 / 59,66 = r^2
196 = r^2
akar 196 = r
14 cm = r