Jawaban:

Diketahui :

Diameter (D) = 42 cm

jari jari (r) = 1/2 x D = 1/2 x 42 = 21 cm

tinggi (t) kerucut = 30 cm

tinggi (t) tabung = 21 cm

Ditanya :

Volume total = ....?

Dijawab :

Menentukan Volume kerucut

V = 1/3 x luas alas x tinggi

V = 1/3 x π x r x r x t

V = 1/3 x 22/7 x 21 x 21 x 30

V = 1/3 x 22 x 3 x 21 x 30

V = 1/3 x 41.580

V = 13.860 cm³

Menentukan Volume tabung

V = π x r x r x t

V = 22/7 x 21 x 21 x 21

V = 22 x 3 x 21 x 21

V = 29.106 cm³

Menentukan Volume setengah bola

V = 2/3 x π x r x r r

V = 2/3 x 22/7 x 21 x 21 x 21

V = 2/3 x 22 x 3 x 21 x 21

V = 2/3 x 29.106

V = 19.404 cm³

Menentukan Volume total

V. Total = V kerucut + V tabung + V 1/2 bola

V. Total = 13.860 + 29.106 + 19.404

V. Total = 62.370 cm³