PSLE
Gillian and Xandra took part in a cycling race. Gillian cycled at a speed of 15 km/h. Both of them did not change their speed throughout the race. When Xandra covered ¹₅ the distance, Gillian was 4.4 km in front of her. Gillian reached the finishing line at 10.28 a.m. What time did Xandra reach the finishing line?
If Gillian continued to cycle until Xandra reaches the finishing point, the extra distance she covered
= 5 x 4.4
= 22 km

Time taken by Xandra to complete the race
= Time taken by Gillian to cycle 22 km
= ²²₁₅ 
= 1⁷₁₅ h

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

88 min after 10.28 a.m.: 11.56 a.m.

Time that Xandra reached the finishing line: 11.56 a.m.

Answer(s): 11.56 a.m.