At 07 20, Tina left Town H and cycled towards Town J. Zara left Town H and cycled towards Town J at 07 50. Zara's cycling speed was 4 km/h faster than Tina. At 11 20, Zara caught up with Tina. Find the cycling speed of each cyclist.
- Tina
- Zara
(a)
Duration that Zara cycled from 07 50 to 11 20
= 3
3060 = 3
12 h
Distance that Zara cycled more than Tina
= 3
12 x 4
= 14 km
However, since Tina left 30 minutes earlier than Zara and Zara caught up with Tina, it means that Tina has cycled 14 km in 30 min.
1 h = 60 min
30 min = 30 ÷ 60 =
12 h
Tina's cycling speed
= 14 ÷
12 = 14 x
21 = 28 km/h
(b)
Zara's cycling speed
= 28 + 4
= 32 km/h
Answer(s): (a) 28 km/h ; (b) 32 km/h
