At 05 10, Sabrina left Town T and cycled towards Town U. Victoria left Town T and cycled towards Town U at 05 55. Victoria's cycling speed was 4 km/h faster than Sabrina. At 11 10, Victoria caught up with Sabrina. Find the cycling speed of each cyclist.

1. Sabrina
2. Victoria

(a)
Duration that Victoria cycled from 05 55 to 11 10
= 5¹⁵₆₀
= 5¹₄ h

Distance that Victoria cycled more than Sabrina
= 5¹₄ x 4
= 21 km

However, since Sabrina left 45 minutes earlier than Victoria and Victoria caught up with Sabrina, it means that Sabrina has cycled 21 km in 45 min.

1 h = 60 min 
45 min = 45 ÷ 60 = ³₄ h

Sabrina's cycling speed
= 21 ÷ ³₄
= 21 x ⁴₃
= 28 km/h

(b)
Victoria's cycling speed
= 28 + 4
= 32 km/h

Answer(s): (a) 28 km/h ; (b) 32 km/h