PSLE
Barbara and Tiffany took part in a cycling race. Barbara cycled at a speed of 15 km/h. Both of them did not change their speed throughout the race. When Tiffany covered ¹₄ the distance, Barbara was 5.5 km in front of her. Barbara reached the finishing line at 10.33 a.m. What time did Tiffany reach the finishing line?
If Barbara continued to cycle until Tiffany reaches the finishing point, the extra distance she covered
= 4 x 5.5
= 22 km

Time taken by Tiffany to complete the race
= Time taken by Barbara to cycle 22 km
= ²²₁₅ 
= 1⁷₁₅ h

1 h = 60 min
1⁷₁₅ h = 1⁷₁₅ x 60 = 88 min

88 min after 10.33 a.m.: 12.01 p.m.

Time that Tiffany reached the finishing line: 12.01 p.m.

Answer(s): 12.01 p.m.