At 5 a.m., Elijah and Harry left Park R and drove towards Park S at average speeds of 99 km/h and 60 km/h respectively. Upon reaching Park S, Elijah rested for 3 hours. He then headed back for Park R at an average speed of 99 km/h along the same route. Elijah and Harry met each other on their way at 12 noon.
- How far had Elijah covered when he met Harry on the way?
- How far apart were the two parks?
(a)
Time taken by Harry = 7 h
Time taken by Elijah = 7 - 3 = 4 h
Distance covered by Elijah when he met Harry
= 4 x 99
= 396 km
(b)
Distance travelled by Harry
= 7 x 60
= 420 km
Distance of the two parks
= (396 + 420) ÷ 2
= 816 ÷ 2
= 408 km
Answer(s): (a) 396 km; (b) 408 km