At 8 a.m., Pierre and Sam left Park R and drove towards Park S at average speeds of 72 km/h and 62 km/h respectively. Upon reaching Park S, Pierre rested for 2 hours. He then headed back for Park R at an average speed of 72 km/h along the same route. Pierre and Sam met each other on their way at 2 p.m.
- How far had Pierre covered when he met Sam on the way?
- How far apart were the two parks?
(a)
Time taken by Sam = 6 h
Time taken by Pierre = 6 - 2 = 4 h
Distance covered by Pierre when he met Sam
= 4 x 72
= 288 km
(b)
Distance travelled by Sam
= 6 x 62
= 372 km
Distance of the two parks
= (288 + 372) ÷ 2
= 660 ÷ 2
= 330 km
Answer(s): (a) 288 km; (b) 330 km