At 6 a.m., John and David left Park B and drove towards Park C at average speeds of 80 km/h and 54 km/h respectively. Upon reaching Park C, John rested for 3 hours. He then headed back for Park B at an average speed of 80 km/h along the same route. John and David met each other on their way at 1 p.m.
- How far had John covered when he met David on the way?
- How far apart were the two parks?
(a)
Time taken by David = 7 h
Time taken by John = 7 - 3 = 4 h
Distance covered by John when he met David
= 4 x 80
= 320 km
(b)
Distance travelled by David
= 7 x 54
= 378 km
Distance of the two parks
= (320 + 378) ÷ 2
= 698 ÷ 2
= 349 km
Answer(s): (a) 320 km; (b) 349 km