Question

help please bantuin lahhh

Answer 1

Lp 1/2 bola = 1/2 × 4 × pi × r^2
= 2 × pi × 3^2
= 2 × pi × 9
= 18pi

Ls tabung = pi × 2r × t
= pi × 2 × 3 × 9
= 54pi

Ls kerucut = pi × r × s
= pi × 3 × 5
= 15pi

Lp total = 18pi + 54pi + 15pi
= 87pi = 87 × 3,14 = 273,18 dm^3 (D)