Question
Justin and Zoe were in a roller skating race. Justin was travelling at a constant speed of 21 km/h and they both did not change their speed. When Zoe completed half of her race, Justin was 2.1 km ahead. Justin completed the race at 9.45 a.m. What time did Zoe complete the race?
3 m

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Justin and Zoe were in a roller skating race. Justin was travelling at a constant speed of 21 km/h and they both did not change their speed. When Zoe completed half of her race, Justin was 2.1 km ahead. Justin completed the race at 9.45 a.m. What time did Zoe complete the race?