At 6 a.m., David and Oliver left Park H and drove towards Park J at average speeds of 81 km/h and 63 km/h respectively. Upon reaching Park J, David rested for 2 hours. He then headed back for Park H at an average speed of 81 km/h along the same route. David and Oliver met each other on their way at 2 p.m.
- How far had David covered when he met Oliver on the way?
- How far apart were the two parks?
(a)
Time taken by Oliver = 8 h
Time taken by David = 8 - 2 = 6 h
Distance covered by David when he met Oliver
= 6 x 81
= 486 km
(b)
Distance travelled by Oliver
= 8 x 63
= 504 km
Distance of the two parks
= (486 + 504) ÷ 2
= 990 ÷ 2
= 495 km
Answer(s): (a) 486 km; (b) 495 km