At 07 25, Kylie left Town G and cycled towards Town H. Julie left Town G and cycled towards Town H at 07 55. Julie's cycling speed was 2 km/h faster than Kylie. At 11 25, Julie caught up with Kylie. Find the cycling speed of each cyclist.
- Kylie
- Julie
(a)
Duration that Julie cycled from 07 55 to 11 25
= 3
3060 = 3
12 h
Distance that Julie cycled more than Kylie
= 3
12 x 2
= 7 km
However, since Kylie left 30 minutes earlier than Julie and Julie caught up with Kylie, it means that Kylie has cycled 7 km in 30 min.
1 h = 60 min
30 min = 30 ÷ 60 =
12 h
Kylie's cycling speed
= 7 ÷
12 = 7 x
21 = 14 km/h
(b)
Julie's cycling speed
= 14 + 2
= 16 km/h
Answer(s): (a) 14 km/h ; (b) 16 km/h
