tolong dibantu dong kakak
Jawaban:
16. D. 2400 cm³
17. B. 1164 cm²
Penjelasan dengan langkah-langkah:
16. Volume balok = p x l x t = 16 x 10 x 9 = 1.440cm³
Volume prisma = L. alas x tinggi =
[1/2 x 10 x (13² - 5²) = 5 x (169-25 = 144)]
(5 x √144) = 5 x 12 x 16 = 960 cm³
V. balok + V. prisma = 1.440 + 960 = 2.400 cm³
17. L. permukaan balok = 2(p x l) + 2(p x t) + 2(l x t)
(16 x 10 = 160) + 2(16 x 9 = 144) + 2(10 x 9 = 90)
160 + 288 + 180 = 28 cm²
L. permukaan prisma =
2(1/2 x 10 x 12 = 60) + 2(16 x 13 = 208)
120 + 416 = 536 cm²
L. permukaan balok + prisma = 628 cm² + 536 cm²
= 1.164 cm²
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