Answer: 25
Explanation:
Given : Water stations will be placed every 600 meters of a fifteen kilometer race.
i.e. Total length of the race track = 15 kilometers
Since 1 km= 1000 m
Then , Total length of the race track = 15000 kilometers
Distance required to place water stations = 600 meters
Then , the number of water stations will be needed is given by :-

Hence, the number of water stations will be needed = 25