At 7 a.m., Riordan and Oliver left Park S and drove towards Park T at average speeds of 80 km/h and 55 km/h respectively. Upon reaching Park T, Riordan rested for 3 hours. He then headed back for Park S at an average speed of 80 km/h along the same route. Riordan and Oliver met each other on their way at 1 p.m.
- How far had Riordan covered when he met Oliver on the way?
- How far apart were the two parks?
(a)
Time taken by Oliver = 6 h
Time taken by Riordan = 6 - 3 = 3 h
Distance covered by Riordan when he met Oliver
= 3 x 80
= 240 km
(b)
Distance travelled by Oliver
= 6 x 55
= 330 km
Distance of the two parks
= (240 + 330) ÷ 2
= 570 ÷ 2
= 285 km
Answer(s): (a) 240 km; (b) 285 km