At 5 a.m., David and Elijah left Park K and drove towards Park L at average speeds of 88 km/h and 52 km/h respectively. Upon reaching Park L, David rested for 3 hours. He then headed back for Park K at an average speed of 88 km/h along the same route. David and Elijah met each other on their way at 12 noon.
- How far had David covered when he met Elijah on the way?
- How far apart were the two parks?
(a)
Time taken by Elijah = 7 h
Time taken by David = 7 - 3 = 4 h
Distance covered by David when he met Elijah
= 4 x 88
= 352 km
(b)
Distance travelled by Elijah
= 7 x 52
= 364 km
Distance of the two parks
= (352 + 364) ÷ 2
= 716 ÷ 2
= 358 km
Answer(s): (a) 352 km; (b) 358 km