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Jawaban:

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Penjelasan dengan langkah-langkah:

1) V = L. Alas x T. Prisma

= (½ x a x t) x T. Prisma

= (½ x 6 x 8) x 20

= 24 x 20

= 480 cm³

2) T. Air = 20 – 10 = 10 cm

V = πr²t = 22/7 x 7² x 10 = 1.540 cm³

3) V = ⅓ x L. Alas x T. Limas

= ⅓ x (s²) x T. Limas

= ⅓ x (10²) x 18

= ⅓ x 100 x 18

= 600 cm³

4) r = d/2 = 26/2 = 13 mm

V = ⅓πr²t = ⅓ x 3,14 x 13² x 15 = 2.653,3 cm³

5) r = d/2 = 21/2 = 10,5 cm

V = 4/3πr³ = 4/3 x 22/7 x 10,5³ = 4.851 cm³