At 7 a.m., Bobby and Glen left Park Y and drove towards Park Z at average speeds of 78 km/h and 55 km/h respectively. Upon reaching Park Z, Bobby rested for 2 hours. He then headed back for Park Y at an average speed of 78 km/h along the same route. Bobby and Glen met each other on their way at 1 p.m.
- How far had Bobby covered when he met Glen on the way?
- How far apart were the two parks?
(a)
Time taken by Glen = 6 h
Time taken by Bobby = 6 - 2 = 4 h
Distance covered by Bobby when he met Glen
= 4 x 78
= 312 km
(b)
Distance travelled by Glen
= 6 x 55
= 330 km
Distance of the two parks
= (312 + 330) ÷ 2
= 642 ÷ 2
= 321 km
Answer(s): (a) 312 km; (b) 321 km