Question
Simon and Cathy were in a roller skating race. Simon was travelling at a constant speed of 21 km/h and they both did not change their speed. When Cathy completed half of her race, Simon was 2.1 km ahead. Simon completed the race at 11.15 a.m. What time did Cathy complete the race?
3 m

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Simon and Cathy were in a roller skating race. Simon was travelling at a constant speed of 21 km/h and they both did not change their speed. When Cathy completed half of her race, Simon was 2.1 km ahead. Simon completed the race at 11.15 a.m. What time did Cathy complete the race?