Harry left City C for City B at 08 31. Yen left City C for City C at the same time. At 11 31, they were 480 km apart. Both maintained a constant speed and reached their destination at the same time at 15 19.
- Find the distance between Cities A and C.
- If Yen was 79 the speed of Harry, find Harry's speed.
(a)
Time taken for Harry and Yen to travel 08 31 to 11 31 = 3 h
Time taken for Harry and Yen to travel 08 31 to 15 19 = 6 h 48 min = 6
4860 h = 6
45 h
Distance travelled by Harry and Yen in 1 hour
= 480 ÷ 3
= 160 km
Total distance
= 6
45 x 160
= 1088 km
(b)
Yen's distance : Harry's distance
7 : 9
Yen's speed : Harry's speed
7 : 9
16 u = 160 km
1 u = 160 ÷ 16 = 10 km
Harry's speed
= 9 u
= 9 x 10
= 90 km/h
Answer(s): (a) 1088 km; (b) 90km/h