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Verified answer
84 detik = 14 tutup botol2 menit = x tutup botol
2 menit = 2 x 60 = 120 detik
84/120 = 14/x
84 . x = 120 . 14
84x = 1680
x = 1680/84
= 20 tutup botol
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= 1 2/5 menit = 1,4 menit
1,4 menit = 14 botol
2 menit = x botol
1,4x = 2×14
1,4 x = 28
x = 20