At 9 a.m., Andy and Charlie left Park A and drove towards Park B at average speeds of 90 km/h and 55 km/h respectively. Upon reaching Park B, Andy rested for 3 hours. He then headed back for Park A at an average speed of 90 km/h along the same route. Andy and Charlie met each other on their way at 1 p.m.
- How far had Andy covered when he met Charlie on the way?
- How far apart were the two parks?
(a)
Time taken by Charlie = 4 h
Time taken by Andy = 4 - 3 = 1 h
Distance covered by Andy when he met Charlie
= 1 x 90
= 90 km
(b)
Distance travelled by Charlie
= 4 x 55
= 220 km
Distance of the two parks
= (90 + 220) ÷ 2
= 310 ÷ 2
= 155 km
Answer(s): (a) 90 km; (b) 155 km