Tolong bgt ya bantu kerjakan Sekarang harus di kumpulin Pakai caranya!!!

4. v = 4/3 πr^3
36π=4/3π r^3
36 = 4/3 r^3
36/4/3=r^3
27 =r^3
r= 3



5.v= 1/2 4/3 π r^3
v1= 4/6 π r^3
= 4/6 22/7 r^3
=4/6 22/7 1000
=44000/21

v2=22/7 10^2.t
44000/21= 22/7 100 t
44000/21. 7/2200=t
t=20/3