Question

Tolong jawab nomor 29+30 ya. pake caranya. makasih

Answer 1

1) d = 16 cm--> r = 8 dm
V 1/2 bola = 1/2 (4/3) (π r³) 
V = 2/3 (π)(8³) = 1024/3 π

2)
r= 50 cm = 5 dm
t= 2,8 m = 28 dm
V= π r² t x 1,2 kg
V = 22/7 (5²)(28)(1,2) = 2.640 kg