Question
Howard and Sarah were in a roller skating race. Howard was travelling at a constant speed of 21 km/h and they both did not change their speed. When Sarah completed half of her race, Howard was 2.1 km ahead. Howard completed the race at 9.20 a.m. What time did Sarah complete the race?
3 m

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Howard and Sarah were in a roller skating race. Howard was travelling at a constant speed of 21 km/h and they both did not change their speed. When Sarah completed half of her race, Howard was 2.1 km ahead. Howard completed the race at 9.20 a.m. What time did Sarah complete the race?