At 6 a.m., Justin and Charlie left Park X and drove towards Park Y at average speeds of 100 km/h and 65 km/h respectively. Upon reaching Park Y, Justin rested for 2 hours. He then headed back for Park X at an average speed of 100 km/h along the same route. Justin and Charlie met each other on their way at 12 noon.
- How far had Justin covered when he met Charlie on the way?
- How far apart were the two parks?
(a)
Time taken by Charlie = 6 h
Time taken by Justin = 6 - 2 = 4 h
Distance covered by Justin when he met Charlie
= 4 x 100
= 400 km
(b)
Distance travelled by Charlie
= 6 x 65
= 390 km
Distance of the two parks
= (400 + 390) ÷ 2
= 790 ÷ 2
= 395 km
Answer(s): (a) 400 km; (b) 395 km