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nomor 8.
06.15 → 07.30 = 1 jam 15 menit = 1 1/4 jam
1 1/4 jam × 50 km/jam
= 5/4 jam × 50 km/jam
= 62,5 km → C
nomor 9.
Luas layang-layang
= 1/2 × d1 × d2
= 1/2 × 12 cm × (20 cm + 8 cm)
= 1/2 × 12 cm × 28 cm
= 1/2 × 336 cm²
= 168 cm² → B
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