Bantuu akuu plisee!tquu!✨
Jawab:
tabung
1. r = 10 , t = 20
v tabung= π r ² t
V = 3,14 x 10² x 20
V = 6.280 cm³
Luas permukaan = LP
LP = 2π r ( r + t)
LP = 2(3,14)(10)( 10+ 20)
LP = 62,8 (30)=1.884 cm²
2. r= 21
t =28
V = π r² t
V = 22/7 x 21² x 28
V = 38.808 cm³
LP = 2π r ( r + t)
LP = 2 (22/7)(21)(21 + 28)
LP = 132(49)
LP = 6.468 cm²