Sebuah kerucut dengan diameter 18cm dan garis pelukis 15 cm jika π nya 3,14 berapakah volumenya ?
silvi14
R = 1/2d r = 1/2 x 18 r = 9 t² = √15² - 9² t² = √225 - 81 t² = √144 t = 12 volume kerucut = 1/3 x πr² x t = 1/3 x 3,14 x 9 x9 x 12 = 1017,36 cm³
r = 1/2 x 18
r = 9
t² = √15² - 9²
t² = √225 - 81
t² = √144
t = 12
volume kerucut = 1/3 x πr² x t
= 1/3 x 3,14 x 9 x9 x 12
= 1017,36 cm³
=15² - 9²
= 225 - 81
= √144
= 12
volume = 1/3 X 3.14 X 9 X 9 X 12
= 1017,36 cm³