At 06 10, Yen left Town W and cycled towards Town X. Cindy left Town W and cycled towards Town X at 06 50. Cindy's cycling speed was 3 km/h faster than Yen. At 12 10, Cindy caught up with Yen. Find the cycling speed of each cyclist.
- Yen
- Cindy
(a)
Duration that Cindy cycled from 06 50 to 12 10
= 5
2060 = 5
13 h
Distance that Cindy cycled more than Yen
= 5
13 x 3
= 16 km
However, since Yen left 40 minutes earlier than Cindy and Cindy caught up with Yen, it means that Yen has cycled 16 km in 40 min.
1 h = 60 min
40 min = 40 ÷ 60 =
23 h
Yen's cycling speed
= 16 ÷
23 = 16 x
32 = 24 km/h
(b)
Cindy's cycling speed
= 24 + 3
= 27 km/h
Answer(s): (a) 24 km/h ; (b) 27 km/h
