At 5 a.m., Oliver and Jack left Park D and drove towards Park E at average speeds of 81 km/h and 52 km/h respectively. Upon reaching Park E, Oliver rested for 3 hours. He then headed back for Park D at an average speed of 81 km/h along the same route. Oliver and Jack met each other on their way at 12 noon.
- How far had Oliver covered when he met Jack on the way?
- How far apart were the two parks?
(a)
Time taken by Jack = 7 h
Time taken by Oliver = 7 - 3 = 4 h
Distance covered by Oliver when he met Jack
= 4 x 81
= 324 km
(b)
Distance travelled by Jack
= 7 x 52
= 364 km
Distance of the two parks
= (324 + 364) ÷ 2
= 688 ÷ 2
= 344 km
Answer(s): (a) 324 km; (b) 344 km