tolong jawab pleas pake caranya

r=d÷2=30÷2=15
V=π×r×r=La×t
=3,14×15×15×50=35.325 cm³(A)
#Maaf kalo salah yaa...

= 3,14 x r x r x t
= 3, 14 x (30:2) x (30:2) x 50
= 3,14 x 15 x 15 x 50
= 47,1 x 15 x 50
= 706,5 x 50
= 353.250 = 35.325 cm2