tolong pengting no 4

Luas selimut = 942 cm²
D = 20 cm
r = D/2 = 20 / 2 = 10 cm

Luas selimut = 942
2.π.r.t = 942
2 x 3,14 x 10 x t = 942
62,8 x t = 942
t = 942 / 62,8
t = 15 cm

jawaban C

selimut= keliling × tinggi
942= (π× 20) × tinggi
942= (3,14×20) × t
942 = 62,8×t
942÷62,8 = t
15 = t
tinggi = 15