Holly has a piece of string that she cuts to be the diameter her bicycle wheel. she is then going to mark how many pieces of string she would need to go around the outside of the wheel. how many pieces of string would she need? a) 0.5 b) 3 c) 3.14 d) 6

The correct answer is c) 3.14

The length of the string that she have is equal to the diameter of the wheel.

Now she wants to know the number of pieces of string she would need to go around the outside of the wheel, that is along the circumference of the wheel.

Now, the formula for the diameter is,

where d is the diameter and r the radius.

and the formula of circumference is,

circumference of circle =

Thus, to go around the circumference of wheel, she will need pieces of sting of length equal to diameter of the wheel.