PSLE
Victoria and Esther took part in a cycling race. Victoria cycled at a speed of 21 km/h. Both of them did not change their speed throughout the race. When Esther covered ¹₅ the distance, Victoria was 2.8 km in front of her. Victoria reached the finishing line at 11.47 a.m. What time did Esther reach the finishing line?
If Victoria continued to cycle until Esther reaches the finishing point, the extra distance she covered
= 5 x 2.8
= 14 km

Time taken by Esther to complete the race
= Time taken by Victoria to cycle 14 km
= ¹⁴₂₁ 
= ²₃ h

1 h = 60 min
²₃ h = ²₃ x 60 = 40 min

40 min after 11.47 a.m.: 12.27 p.m.

Time that Esther reached the finishing line: 12.27 p.m.

Answer(s): 12.27 p.m.