At 09 10, Joelle left Town F and cycled towards Town G. Nora left Town F and cycled towards Town G at 09 55. Nora's cycling speed was 4 km/h faster than Joelle. At 12 10, Nora caught up with Joelle. Find the cycling speed of each cyclist.
- Joelle
- Nora
(a)
Duration that Nora cycled from 09 55 to 12 10
= 2
1560 = 2
14 h
Distance that Nora cycled more than Joelle
= 2
14 x 4
= 9 km
However, since Joelle left 45 minutes earlier than Nora and Nora caught up with Joelle, it means that Joelle has cycled 9 km in 45 min.
1 h = 60 min
45 min = 45 ÷ 60 =
34 h
Joelle's cycling speed
= 9 ÷
34 = 9 x
43 = 12 km/h
(b)
Nora's cycling speed
= 12 + 4
= 16 km/h
Answer(s): (a) 12 km/h ; (b) 16 km/h
