At 5 a.m., Pierre and Sean left Park Z and drove towards Park A at average speeds of 70 km/h and 50 km/h respectively. Upon reaching Park A, Pierre rested for 3 hours. He then headed back for Park Z at an average speed of 70 km/h along the same route. Pierre and Sean met each other on their way at 12 noon.
- How far had Pierre covered when he met Sean on the way?
- How far apart were the two parks?
(a)
Time taken by Sean = 7 h
Time taken by Pierre = 7 - 3 = 4 h
Distance covered by Pierre when he met Sean
= 4 x 70
= 280 km
(b)
Distance travelled by Sean
= 7 x 50
= 350 km
Distance of the two parks
= (280 + 350) ÷ 2
= 630 ÷ 2
= 315 km
Answer(s): (a) 280 km; (b) 315 km
