There is a fish burning machine which can burn up to two fish at once, and it takes 5 minutes to burn one side.
How many minutes does it take for three fish to be burned double-sided at the shortest ?
How many minutes does it take for three fish to be burned double-sided at the shortest ?
Answer
15 minutes
Solution
Assume that we burn three fish, A, B, and C.
First, we burn one side both of A and B.
First, we burn one side both of A and B.
Next, burn the reverse side of A and one side of C.
Finally, burn the reverse side both of B and C.
In total it takes 15 minutes.
