Question

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Answer 1

Verified answer

Penyelesaian:

36.) Jawaban: 70 km

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Panjang AB = 200 km

Panjang BC = AE = 150 km

Panjang CD = 280 km

Panjang DE = (280 - 200) km = 80 km

Panjang DA:

• = [tex] \sqrt{AE² + DE²}[/tex]
• = [tex] \sqrt{150² + 80²}[/tex]
• = [tex] \sqrt{22.500 + 6.400}[/tex]
• = [tex] \sqrt{28.900}[/tex]
• = 70 km

37.)

r = 20 m

p = 26 m

l = 12 m

Harga rumput per m² = Rp3.500

Upah tukang = Rp1.000.000

a.) Jawaban: 944 m²

Luas daerah yang ditanami rumput:

• = L_taman - L_kolam
• = (πr²) - (p × l)
• = (3,14 × 20²) - (26 × 12)
• = 1.256 - 312
• = 944 m²

b.) Jawaban: Rp4.304.000

Biaya untuk menanam rumput:

• = Rp((944 × 3.500) + 1.000.000)
• = Rp(3.304.000 + 1.000.000)
• = Rp4.304.000

38.) Jawaban: 624 m²

S = 8

TB = 15 m

TL = 3 m

tinggi sisi tegak limas (TSTL):

• TSTL = [tex] \sqrt{(8÷2)² + 3²}[/tex]
• TSTL = [tex] \sqrt{4² + 3²}[/tex]
• TSTL = [tex] \sqrt{16+9}[/tex]
• TSTL = [tex] \sqrt{25}[/tex]
• TSTL = 5 m

Luas permukaan monumen:

= (4 (S × TB)) + (S²) + (4 × [tex]\frac{S × TSTL}{2}[/tex])

= (4 (8 × 15)) + (8²) + (2 × 8 × 5)

= (4 (120)) + 64 + (2 × 8 × 5)

= 480 + 64 + 80

= 624 m²