Question

Monica wants to tie a ribbon around the trunk of an oak tree that has a circular trunk about 11 inches in diameter. Not counting the ribbon needed to make a bow, how many inches of ribbon are needed just to reach around the tree?

Answer 1

Answer:  34.57 inches.

Step-by-step explanation:

Given : Diameter of tree's trunk =  11 inches

Then, the length of ribbon needed just to reach around the tree = Circumference of trunk.

We know that the circumference of the circle is given by :-

$C=\pi d$ , where d= diameter

Then, Circumference of trunk. = $\pi (11)$

Put $\pi=\dfrac{22}{7}$ , we get

Circumference of trunk. = $\dfrac{22}{7}\times(11)\approx34.57\text{ inches}$

Hence , the length of ribbon needed just to reach around the tree = 34.57 inches.