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Verified answer
1jam = 3600 detik1menit = 60detik
2jam = 2×3600
=7200
45menit = 60×45
=2700
2jam-45menit
=7200-2700
=4500detik
karna 2 jam jadi 2×3.600 = 7.200 detik
1 menit = 60 detik
karna 45 menit jadi 45×60 = 2.700 detik
Jadi 7.200-2.700 = 4.500 detik
semoga membantu dan bermanfaat