At 5 a.m., Perry and Mark left Park K and drove towards Park L at average speeds of 81 km/h and 64 km/h respectively. Upon reaching Park L, Perry rested for 2 hours. He then headed back for Park K at an average speed of 81 km/h along the same route. Perry and Mark met each other on their way at 1 p.m.
- How far had Perry covered when he met Mark on the way?
- How far apart were the two parks?
(a)
Time taken by Mark = 8 h
Time taken by Perry = 8 - 2 = 6 h
Distance covered by Perry when he met Mark
= 6 x 81
= 486 km
(b)
Distance travelled by Mark
= 8 x 64
= 512 km
Distance of the two parks
= (486 + 512) ÷ 2
= 998 ÷ 2
= 499 km
Answer(s): (a) 486 km; (b) 499 km