Answer:
15/8
Step-by-step explanation:
Let "d" be the total distance, that is, the distance for swimming (s), running (r) and going by bike (b).
d = s + r + b  [1]
1/24 of the total distance is covered by  swimming.
s = 1/24 d  [2]
1/3 of the distance is covered by running.
r = 1/3 d  [3]
If we replace [2] and [3] in [1], we get
d = 1/24 d + 1/3 d + b
b = d - 1/24 d - 1/3 d
b = 24/24 d - 1/24 d - 8/24 d
b = 15/24 d = 5/8 d
The ratio of  the distance covered by bike to the distance covered by running is:
b/r = (5/8 d)/(1/3 d) = 15/8
