Luas permukaan gabungan
[tex] \pi \times r(3 \times r + 2 \times t) \\ \frac{22}{7} \times 7(3 \times 7 + 2 \times 25) \\ 22(21 + 50) \\ 22(71) \\ 1.562 \: {cm}^{2} \: (A)[/tex]
Jawaban:
Luas Permukaan bangun gabungan
= (Luas Permukaan bola/2) + Luas selimut tabung + Luas alas tabung
= ((4×π×r²)/2) + (2×π×r×t) + (π×r²)
= (2×22/7×(d/2)²) + (2×22/7×(d/2)×25) + (22/7×(d/2)²)
= (2×22/7×(14/2)²) + (2×22/7×(14/2)×25) + (22/7×(14/2)²)
= (2×22/7×7²) + (2×22/7×7×25) + (22/7×7²)
= (2×22×7) + (2×22×25) + (22×7)
= 308 + 1.100 + 154
= 308 + 1.254
= 1.562 cm² (opsi A)
Jadi, Luas permukaan bangun ruang gabungan tersebut adalah 1.562 cm²
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Luas permukaan gabungan
[tex] \pi \times r(3 \times r + 2 \times t) \\ \frac{22}{7} \times 7(3 \times 7 + 2 \times 25) \\ 22(21 + 50) \\ 22(71) \\ 1.562 \: {cm}^{2} \: (A)[/tex]
Jawaban:
•~Jawaban~•
Luas Permukaan bangun gabungan
= (Luas Permukaan bola/2) + Luas selimut tabung + Luas alas tabung
= ((4×π×r²)/2) + (2×π×r×t) + (π×r²)
= (2×22/7×(d/2)²) + (2×22/7×(d/2)×25) + (22/7×(d/2)²)
= (2×22/7×(14/2)²) + (2×22/7×(14/2)×25) + (22/7×(14/2)²)
= (2×22/7×7²) + (2×22/7×7×25) + (22/7×7²)
= (2×22×7) + (2×22×25) + (22×7)
= 308 + 1.100 + 154
= 308 + 1.254
= 1.562 cm² (opsi A)
Jadi, Luas permukaan bangun ruang gabungan tersebut adalah 1.562 cm²
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