volume benda putar kurva y= 2x ; x=3 ; x= 4 sejauh 360^

Volume Benda Putar  mengelilingi sumbu x 360
y = 2x
x= 3
x = 4 

V =   π  (3..4) ∫ y² dx
V = π (3..4) ∫ (4x²) dx
V = π  [ 4/3 x³](3..4)
V = π [ 4/3 (4³-3³) ] 
V = π [ 4/3 (37)]
V = 148/3  π