At 5 a.m., Billy and Eric left Park F and drove towards Park G at average speeds of 78 km/h and 50 km/h respectively. Upon reaching Park G, Billy rested for 2 hours. He then headed back for Park F at an average speed of 78 km/h along the same route. Billy and Eric met each other on their way at 12 noon.
- How far had Billy covered when he met Eric on the way?
- How far apart were the two parks?
(a)
Time taken by Eric = 7 h
Time taken by Billy = 7 - 2 = 5 h
Distance covered by Billy when he met Eric
= 5 x 78
= 390 km
(b)
Distance travelled by Eric
= 7 x 50
= 350 km
Distance of the two parks
= (390 + 350) ÷ 2
= 740 ÷ 2
= 370 km
Answer(s): (a) 390 km; (b) 370 km
