Türk lise öğrencilerinin sadece %1'inin çözebildiği soru
- Helen rode her bike from home to the river, which is 4 km away. It took her 9 minutes. She rode home using a shorter route of 3 km. This only took her 6 minutes. What was Helen’s average speed, in km/h, for the trip to the river and back?
- Cevap 28 km/h bu arada
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