At 7 a.m., Billy and Riordan left Park H and drove towards Park J at average speeds of 89 km/h and 60 km/h respectively. Upon reaching Park J, Billy rested for 2 hours. He then headed back for Park H at an average speed of 89 km/h along the same route. Billy and Riordan met each other on their way at 1 p.m.
- How far had Billy covered when he met Riordan on the way?
- How far apart were the two parks?
(a)
Time taken by Riordan = 6 h
Time taken by Billy = 6 - 2 = 4 h
Distance covered by Billy when he met Riordan
= 4 x 89
= 356 km
(b)
Distance travelled by Riordan
= 6 x 60
= 360 km
Distance of the two parks
= (356 + 360) ÷ 2
= 716 ÷ 2
= 358 km
Answer(s): (a) 356 km; (b) 358 km