At 5 a.m., Riordan and Andy left Park U and drove towards Park V at average speeds of 78 km/h and 61 km/h respectively. Upon reaching Park V, Riordan rested for 2 hours. He then headed back for Park U at an average speed of 78 km/h along the same route. Riordan and Andy met each other on their way at 1 p.m.
- How far had Riordan covered when he met Andy on the way?
- How far apart were the two parks?
(a)
Time taken by Andy = 8 h
Time taken by Riordan = 8 - 2 = 6 h
Distance covered by Riordan when he met Andy
= 6 x 78
= 468 km
(b)
Distance travelled by Andy
= 8 x 61
= 488 km
Distance of the two parks
= (468 + 488) ÷ 2
= 956 ÷ 2
= 478 km
Answer(s): (a) 468 km; (b) 478 km