At 07 25, Usha left Town X and cycled towards Town Y. Ivory left Town X and cycled towards Town Y at 07 55. Ivory's cycling speed was 2 km/h faster than Usha. At 14 25, Ivory caught up with Usha. Find the cycling speed of each cyclist.
- Usha
- Ivory
(a)
Duration that Ivory cycled from 07 55 to 14 25
= 6
3060 = 6
12 h
Distance that Ivory cycled more than Usha
= 6
12 x 2
= 13 km
However, since Usha left 30 minutes earlier than Ivory and Ivory caught up with Usha, it means that Usha has cycled 13 km in 30 min.
1 h = 60 min
30 min = 30 ÷ 60 =
12 h
Usha's cycling speed
= 13 ÷
12 = 13 x
21 = 26 km/h
(b)
Ivory's cycling speed
= 26 + 2
= 28 km/h
Answer(s): (a) 26 km/h ; (b) 28 km/h
