Question

Please answer this math question.

Answer 1

Answer:

21 minutes

Step-by-step explanation:

To cut a 5-ft log into 5 equal peices, you need to make 4 cuts (each cut cuts one piece from a whole log, the last cut divides the remaining log into two pieces).

If it takes $5\dfrac{1}{4}$ minutes to make one cut, then it takes

$5\dfrac{1}{4}\cdot 4=\dfrac{5\cdot 4+1}{4}\cdot 4=\dfrac{21}{4}\cdot 4=21$

minutes to cut the log into 5 equal pieces.