Answer:
Third placer consumed 24 hot dogs.
Winner consumed 48 hot dogs.
Explanation:
Lets assume that the third runner up eats x hot dogs.
The total time for the contest is 15x seconds.
Given is that the winner ate (x+24) hot dogs
The winner's rate of eating is 1 hot dog per 7.5 seconds.
And we know the rate =

We get;




x = 24 (third placer)
And the winner consumed
hot dogs.