Question
Ian and Natalie were in a roller skating race. Ian was travelling at a constant speed of 20 km/h and they both did not change their speed. When Natalie completed half of her race, Ian was 2.5 km ahead. Ian completed the race at 11.50 a.m. What time did Natalie complete the race?
3 m

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Ian and Natalie were in a roller skating race. Ian was travelling at a constant speed of 20 km/h and they both did not change their speed. When Natalie completed half of her race, Ian was 2.5 km ahead. Ian completed the race at 11.50 a.m. What time did Natalie complete the race?