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18. K = J : W
= 228 km : 4,75 jam
= A. 48 km
1 ha = 10.000 m2
3,5 ha = 35.000 m2
Anak: 96 dam2 = 9.600 m2
Padi : 1,65 hm2 = 16.500 m2
Luas Kebun Total = L untuk anak + L untuk padi + L untuk Perumahan
L untuk Perumahan = 35.000 m2 - 9.600 m2 - 16.500 m2
= 8.900 m2 (B)
18. Pekanbaru - Dumai :
S = 228 km
T = 4 jam 45 menit = 4 3/4 jam = 19/4 jam = 4,75 jam
v = s/t
v = 228/4,75
v = 49 km/jam (A)