At 9 a.m., Fanny and Tammy raced off together from the starting point of a track. Fanny ran at an average speed of 2 m/s. Tammy ran at an average speed of 4 m/s. Upon reaching the end of the track, Tammy rested for 6 minutes. She then immediately ran back along the same route at 4 m/s. At 9.35 a.m., Fanny met Tammy.

1. Find the total distance covered by the two runners when they met each other. Express your answer in km.
2. Find the length of the trail in km.

(a)
From 9 a.m. to 9.35 a.m. = 35 min

Duration that Fanny ran = 35 min
Duration that Tammy ran = 35 -  6 = 29 min

1 min = 60 s

29 min = 29 x 60 = 1740 s
35 min = 35 x 60 = 2100 s

Distance that Fanny ran
= 2 x 2100
= 4200 m

Distance that Tammy ran
= 4 x 1740
= 6960 m

Distance that Fanny and Tammy ran
= 4200 + 6960
= 11160 m

1000 m = 1 km

11160 m = 11160 ÷ 1000 = 11.16 km

(b)
Length of the trail
= 11.16 ÷ 2
= 5.58 km

Answer(s): (a) 11.16 km; (b) 5.58 km