Question

Yang pintar matimatika bantuin dong aku nggak bisa

Answer 1

Verified answer

30) Volume awal = 2 m³
Volume sisa = 1,55 m³
Volume bocor = 2 - 1,55 = 0,45 m³ = 0,45 × 1000 = 450 liter
waktu = ¼ jam = ¼ × 60 = 15 menit
debit = volume ÷ waktu
= 450 liter ÷ 15 menit
= 30 liter/mnt

31) waktu = 1 jam = 3.600 detik
debit = 15 dm³/detik
volume = debit × waktu
= 15 dm³/dtk × 3600 dtk
= 54.000 dm³

32) d = 22 - 8 = 14 cm
r = 14 ÷ 2 = 7 cm
L1 = ½ × π × r²
= ½ × 22/7 × 7 × 7
= 77 cm²
L2 = p × l
= 22 × 6
= 132 cm²
Lttl = 77 + 132 = 209 cm²

33) buat tabel sendiri ya dek ;)

34) suka renang
= 22% × 200
= 22/100 × 200
= 44 siswa
suka bulu tangkis
= 25% × 200
= 25/100 × 200
= 50 siswa

34) jumlah guru
= 25% × 200
= 25/100 × 200
= 50 orang