What is the radius of a circle with a circumference measuring 24 pie cm?

By the way, it's pi, not pie. just wanted you to know as you may lose marks in tests for spelling (but i may be wrong)

we know circumference is pi multiplied by the diameter.

the diameter is 2x the radius

we can re-arrange the first fact to get:

diameter (or 2x radius) = circumference divided by pi.

since the circumference is 24pi we can cancel off pi from the circumference (24pi) and pi.

now we have the diameter = 24

since the diameter is 2x the radius you divide both sides by 2 and get:

radius=12cm