At 8 a.m., Ahmad and Pierre left Park J and drove towards Park K at average speeds of 78 km/h and 60 km/h respectively. Upon reaching Park K, Ahmad rested for 2 hours. He then headed back for Park J at an average speed of 78 km/h along the same route. Ahmad and Pierre met each other on their way at 2 p.m.
- How far had Ahmad covered when he met Pierre on the way?
- How far apart were the two parks?
(a)
Time taken by Pierre = 6 h
Time taken by Ahmad = 6 - 2 = 4 h
Distance covered by Ahmad when he met Pierre
= 4 x 78
= 312 km
(b)
Distance travelled by Pierre
= 6 x 60
= 360 km
Distance of the two parks
= (312 + 360) ÷ 2
= 672 ÷ 2
= 336 km
Answer(s): (a) 312 km; (b) 336 km