Question
David and Diana were in a roller skating race. David was travelling at a constant speed of 20 km/h and they both did not change their speed. When Diana completed half of her race, David was 2.5 km ahead. David completed the race at 10.25 a.m. What time did Diana complete the race?
3 m

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David and Diana were in a roller skating race. David was travelling at a constant speed of 20 km/h and they both did not change their speed. When Diana completed half of her race, David was 2.5 km ahead. David completed the race at 10.25 a.m. What time did Diana complete the race?