At 06 25, Jen left Town Q and cycled towards Town R. Tammy left Town Q and cycled towards Town R at 06 55. Tammy's cycling speed was 4 km/h faster than Jen. At 11 25, Tammy caught up with Jen. Find the cycling speed of each cyclist.
- Jen
- Tammy
(a)
Duration that Tammy cycled from 06 55 to 11 25
= 4
3060 = 4
12 h
Distance that Tammy cycled more than Jen
= 4
12 x 4
= 18 km
However, since Jen left 30 minutes earlier than Tammy and Tammy caught up with Jen, it means that Jen has cycled 18 km in 30 min.
1 h = 60 min
30 min = 30 ÷ 60 =
12 h
Jen's cycling speed
= 18 ÷
12 = 18 x
21 = 36 km/h
(b)
Tammy's cycling speed
= 36 + 4
= 40 km/h
Answer(s): (a) 36 km/h ; (b) 40 km/h
