At 9 a.m., Fiona and Nicole raced off together from the starting point of a path. Fiona ran at an average speed of 3 m/s. Nicole ran at an average speed of 4 m/s. Upon reaching the end of the path, Nicole rested for 5 minutes. She then immediately ran back along the same route at 4 m/s. At 9.30 a.m., Fiona met Nicole.
- Find the total distance covered by the two runners when they met each other. Express your answer in km.
- Find the length of the trail in km.
(a)
From 9 a.m. to 9.30 a.m. = 30 min
Duration that Fiona ran = 30 min
Duration that Nicole ran = 30 - 5 = 25 min
1 min = 60 s
25 min = 25 x 60 = 1500 s
30 min = 30 x 60 = 1800 s
Distance that Fiona ran
= 3 x 1800
= 5400 m
Distance that Nicole ran
= 4 x 1500
= 6000 m
Distance that Fiona and Nicole ran
= 5400 + 6000
= 11400 m
1000 m = 1 km
11400 m = 11400 ÷ 1000 = 11.4 km
(b)
Length of the trail
= 11.4 ÷ 2
= 5.7 km
Answer(s): (a) 11.4 km; (b) 5.7 km