At 5 a.m., Riordan and Ken left Park L and drove towards Park M at average speeds of 84 km/h and 52 km/h respectively. Upon reaching Park M, Riordan rested for 2 hours. He then headed back for Park L at an average speed of 84 km/h along the same route. Riordan and Ken met each other on their way at 12 noon.
- How far had Riordan covered when he met Ken on the way?
- How far apart were the two parks?
(a)
Time taken by Ken = 7 h
Time taken by Riordan = 7 - 2 = 5 h
Distance covered by Riordan when he met Ken
= 5 x 84
= 420 km
(b)
Distance travelled by Ken
= 7 x 52
= 364 km
Distance of the two parks
= (420 + 364) ÷ 2
= 784 ÷ 2
= 392 km
Answer(s): (a) 420 km; (b) 392 km
