At 05 10, Shannon left Town P and cycled towards Town Q. Risa left Town P and cycled towards Town Q at 05 40. Risa's cycling speed was 2 km/h faster than Shannon. At 12 10, Risa caught up with Shannon. Find the cycling speed of each cyclist.

1. Shannon
2. Risa

(a)
Duration that Risa cycled from 05 40 to 12 10
= 6³⁰₆₀
= 6¹₂ h

Distance that Risa cycled more than Shannon
= 6¹₂ x 2
= 13 km

However, since Shannon left 30 minutes earlier than Risa and Risa caught up with Shannon, it means that Shannon has cycled 13 km in 30 min.

1 h = 60 min 
30 min = 30 ÷ 60 = ¹₂ h

Shannon's cycling speed
= 13 ÷ ¹₂
= 13 x ²₁
= 26 km/h

(b)
Risa's cycling speed
= 26 + 2
= 28 km/h

Answer(s): (a) 26 km/h ; (b) 28 km/h