At 07 10, Kylie left Town G and cycled towards Town H. Cindy left Town G and cycled towards Town H at 07 50. Cindy's cycling speed was 3 km/h faster than Kylie. At 15 10, Cindy caught up with Kylie. Find the cycling speed of each cyclist.
- Kylie
- Cindy
(a)
Duration that Cindy cycled from 07 50 to 15 10
= 7
2060 = 7
13 h
Distance that Cindy cycled more than Kylie
= 7
13 x 3
= 22 km
However, since Kylie left 40 minutes earlier than Cindy and Cindy caught up with Kylie, it means that Kylie has cycled 22 km in 40 min.
1 h = 60 min
40 min = 40 ÷ 60 =
23 h
Kylie's cycling speed
= 22 ÷
23 = 22 x
32 = 33 km/h
(b)
Cindy's cycling speed
= 33 + 3
= 36 km/h
Answer(s): (a) 33 km/h ; (b) 36 km/h
