Penyelesaian :
4 orang = 20 menit
8 orang = y
[tex] \bf \: \frac{4}{8} = \frac{y}{20} [/tex]
[tex] \bf8.y = 4.20[/tex]
[tex] \bf \: 8y = 80[/tex]
[tex] \bf \: y = \frac{80}{8} [/tex]
[tex] \bf \: y = 10 \: menit[/tex]
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Gunakan prinsip perbandingan senilai.
[tex] \frac{x1}{x2} = \frac{y1}{y2} [/tex]
Jika kita misalkan
x1=20 menit
y1=8
y2=4
Maka kita sedang mencari nilai x2
[tex] \frac{20}{x} = \frac{8}{4} \\ x = 10[/tex]
Maka waktu yang diperlukan untuk 8 anak adalah 10 menit
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