Volume bangun disamping adalah

Dik :
d = 20 cm, r = 1/2×d = 1/2×20 = 10 cm
t = 21 cm

dit :
volume bangun (tabung) = ?

jwb :
volume = phi×r^2×t = 3,14×10^2×21 = 6,594 cm3

jawaban :
B. 6,594 cm3