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1600 m = 160 dam
400 dm = 4 dam
( 180 dam - 160 dam + 4dam = 24dam ) jadi hasilnya 24 dam (A)
17. 1,6 Ton = 1600kg, 15 kw = 1500kg, 2,1 ton= 2100, 35 kw=3500 kg
1600 + 1500 + 2100 - 3500 = 1700 kg (b)
18. 1 jam 3600 detik
1 menit 60 detik
1jam 24menit 35 detik = 3600 + 1440 (24x60) + 35 = 5075
1 jam 35 menit 14 detik = 3600 + 2100 ( 35x60) + 14 detik = 5714
jadi, 5714 detik - 5075 = 639 detik (d)