Addie uses the circular saw shown below.

How many inches of wood will the saw cut through in 1 complete revolution?

38.47 inches

21.98 inches

153.86 inches

43.96 inches

Question

Addie uses the circular saw shown below.



How many inches of wood will the saw cut through in 1 complete revolution?

 38.47 inches

 21.98 inches

 153.86 inches

 43.96 inches

anonymous · Answer

attachment

anonymous · Answer

1 revolution means the circle has to go around once.  So what do you think you have to calculate in this problem? It has to do with the circle.

anonymous · Answer

you need the formula for the circumference of a circle
it is $C=2\pi r$ and in your case the diameter is $7$ making $r=3.5$ 
plug  in to the formula to get your answer

anonymous · Answer

Would i use the area of a circle to get the answer? @shandelman @satellite73