Bangun Ruang

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1). Mencari panjang balok berlubang:

15 - 5 - 5 = 5 cm

Jawaban:

= Balok seluruhnya - Balok berlubang

= (p × l × t) - (p × l × t)

= (15 × 8 × 6) - (5 × 8 × 3)

= 720 - 120

= 600 cm³

2). V = Balok atas + Balok bawah

= (p × l × t) + (p × l × t)

= (8 × 4 × 2) + (2 × 4 × 8)

= 64 + 64

= 128 cm³

3). V = Balok + Kubus

= (p × l × t) + (s × s × s)

= (4 × 5 × 8) + (5 × 5 × 5)

= 160 + 125

= 285 cm³

4). Mencari panjang balok kanan:

8 - 5 = 3 cm

Jawaban:

V = Balok kiri + Balok kanan

= (p × l × t) + (p × l × t)

= (5 × 5 × 11) + (3 × 3 × 11)

= 275 + 99

= 374 cm³

5). V = Balok + Prisma segitiga

= (p × l × t) + (½ × a × t × t. alas)

= (6 × 10 × 6) + (½ × 6 × 4 × 10)

= 360 + (3 × 4 × 10)

= 360 + 120

= 480 cm³