Question

a cylinder has a diameter of 12 cm and a height of 15 cm. what is the radius of the cylinder?
a. 12 cm
b. 15 cm
c. 6 cm
d. 3 cm

Explanation:

Step1: Recall radius - diameter relation

The formula is $r=\frac{d}{2}$, where $r$ is radius and $d$ is diameter.

Step2: Substitute given diameter

Given $d = 12$ cm, so $r=\frac{12}{2}=6$ cm.

Answer:

C. 6 cm