Question
PSLE
Mary and Opal took part in a cycling race. Mary cycled at a speed of 15 km/h. Both of them did not change their speed throughout the race. When Opal covered 14 the distance, Mary was 4.5 km in front of her. Mary reached the finishing line at 8.31 a.m. What time did Opal reach the finishing line?
3 m

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PSLE
Mary and Opal took part in a cycling race. Mary cycled at a speed of 15 km/h. Both of them did not change their speed throughout the race. When Opal covered 14 the distance, Mary was 4.5 km in front of her. Mary reached the finishing line at 8.31 a.m. What time did Opal reach the finishing line?