pakai cara dan penjelasan ya kk
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Bidang studi:
Matematika -
Penulis:
jonas -
Dibuat:
1 tahun lalu
Jawaban 1
- Sebuah kolam di taman kota berbentuk lingkaran dengan jari jari 7 m. Berapa keliling kolam tersebut?
- Perbandingan jari jari dua buah roda adalah 3:4. Berapakah perbandingan keliling roda tersebut?
- Andri pergi ke luar kota menggunakan sepeda motor memiliki diameter 35 cm. Andri sudah menempuh jarak 11 km. Berapa kali roda motor tersebut berputar?
Jawab
- 44 m²
- 3 : 4
- 100.000 kali
Soal 1
Diketahui
- Jari jari 7 m.
Ditanya
- Keliling kolam.
Jawab
Keliling lingkaran = 2πr
= 2 × 22/7 × 7
= 2 × 22
= 44 m²
Soal 2
Diketahui
- Perbandingan jari jari roda 3:4.
Ditanya
- Perbandingan keliling dua roda.
Jawab
Jika perbandingan jari jari roda 3:4. Maka, misal jari jari roda tersebut adalah 21 dan 28.
2πr : 2πr
2 × 22/7 × 21 : 2 × 22/7 × 28
= 2 × 22 × 3 : 2 × 22 × 4
= 132 : 176
= 3 : 4
Soal 3
Diketahui
- Diameter 35 cm.
- Jarak 11 km = 11.000.000 cm.
Ditanya
- Berapa kali roda berputar.
Jawab
Cari keliling roda
πD= 22/7 × 35
= 110 cm²
Cari berapa kali roda berputar
= 11.000.000 ÷ 110
= 100.000
Pelajari lebih lanjutMateri tentang lingkaran https://brainly.co.id/tugas/95522
#BelajarBersamaBrainly #SPJ1
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Penulis:
dominoqqum
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Nilai jawaban:
1
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[tex] \begin{gathered} \boxed{ \boxed{ \begin{aligned} \underline{ \blue{ \sf{ - 28 + 44}}} \\ \sf{ = 44 + ( - 28)} \\ \sf{ = 28 - 44} \\ \sf{ = 44 - 28} \\ \sf{ = \underline{ \red{16}}}\end{aligned}}} \end{gathered}[/tex]
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