Question

3πd=12π how do i do this

Answer 1

It says 3 times pi (3.14) times the diameter equals 12 times pi 3.14.
12×3.14= 37.68
Now divide by 3 on both sides
The diameter (d) is 4.
Hope that was helpful :)

Answer 2

We divide 3pi on both sides achieving d=4