
TPA Bab 7 Bangun Datar dan Bangun Ruang

Quiz
•
Mathematics
•
Professional Development
•
Hard
Persiapan Tubel
Used 2+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah tangki air berbentuk tabung memiliki diameter alas 2 meter dan tinggi 3 meter. Jika tangki tersebut diisi penuh, berapa liter air yang dapat ditampung?
A) 9420 liter
B) 942 liter
C) 9420 cm³
D) 94200 liter
Answer explanation
(1 m³ = 1000 liter)
Volume tabung = πr²h = π(1 m)²(3 m) = 3π m³ ≈ 9,42 m³. Karena 1 m³ = 1000 liter, maka volume air = 9,42 × 1000 = 9420 liter.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah taman berbentuk lingkaran memiliki diameter 28 meter. Di sekeliling taman akan dipasang pagar kawat sebanyak dua lapis. Berapa panjang kawat yang dibutuhkan?
A) 176 meter
B) 88 meter
C) 352 meter
D) 264 meter
Answer explanation
Keliling lingkaran = πd = π × 28 m ≈ 88 m. Karena pagar dibuat dua lapis, maka total panjang kawat = 2 × 88 m = 176 m.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah balok kayu memiliki dimensi panjang 4 meter, lebar 2 meter, dan tinggi 1 meter. Jika balok tersebut akan dicat seluruh permukaannya, berapa luas permukaan yang harus dicat?
A) 24 m²
B) 28 m²
C) 32 m²
D) 16 m²
Answer explanation
Luas permukaan balok = 2(pl + pt + lt) = 2(4×2 + 4×1 + 2×1) = 2(8 + 4 + 2) = 2 × 14 = 28 m².
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah kerucut memiliki jari-jari alas sebesar 7 cm dan tinggi 24 cm. Hitung luas selimut kerucut!
A) 528 cm²
B) 550 cm²
C) 462 cm²
D) 490 cm²
Answer explanation
Luas selimut kerucut = πr√(r² + t²). Dengan r = 7 cm dan t = 24 cm, maka s (garis pelukis) = √(7² + 24²) = √(49 + 576) = √625 = 25 cm. Luas selimut = π × r × s ≈ (22/7 × 7 × 25) ≈ 550 cm².
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah taman berbentuk persegi panjang dengan panjang 20 meter dan lebar 15 meter. Di sekeliling taman akan dibuat jalan setapak selebar 2 meter. Berapa luas jalan setapak tersebut?
A) 144 m²
B) 148 m²
C) 152 m²
D) 156 m²
Answer explanation
Ukuran taman termasuk jalan setapak: panjang = 20 + 2(2) = 24 meter, lebar = 15 + 2(2) = 19 meter. Luas total (taman + jalan) = 24 x 19 = 456 m². Luas taman = 20 x 15 = 300 m². Luas jalan setapak = Luas total - Luas taman = 456 - 300 = 156 m².
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah tenda pramuka berbentuk limas segi empat dengan alas berukuran 4 meter x 4 meter dan tinggi tenda 3 meter. Berapa volume udara di dalam tenda?
A) 12 m³
B) 16 m³
C) 36 m³
D) 48 m³
Answer explanation
Volume limas = (1/3) x Luas alas x Tinggi. Luas alas = 4 m x 4 m = 16 m². Volume tenda = (1/3) x 16 m² x 3 m = 16 m³.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sebuah bak mandi berbentuk balok berukuran panjang 1.2 meter, lebar 0.8 meter, dan tinggi 0.5 meter. Jika bak tersebut diisi air hingga 80% dari volumenya, berapa liter air yang ada di dalam bak?
A) 384 liter
B) 480 liter
C) 600 liter
D) 720 liter
Answer explanation
(1 m³ = 1000 liter)
Volume bak mandi = panjang x lebar x tinggi = 1.2 m x 0.8 m x 0.5 m = 0.48 m³. Volume air = 80% x 0.48 m³ = 0.8 x 0.48 m³ = 0.384 m³. Volume air dalam liter = 0.384 m³ x 1000 liter/m³ = 384 liter.
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