Question
John and Rachel were in a roller skating race. John was travelling at a constant speed of 21 km/h and they both did not change their speed. When Rachel completed half of her race, John was 2.1 km ahead. John completed the race at 9.30 a.m. What time did Rachel complete the race?
3 m

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John and Rachel were in a roller skating race. John was travelling at a constant speed of 21 km/h and they both did not change their speed. When Rachel completed half of her race, John was 2.1 km ahead. John completed the race at 9.30 a.m. What time did Rachel complete the race?