Ok first you need to find the radius of the cone.
Since you’re given the circumference 3.14, we can use the formula for circumference 2piR to find the radius.
3.14=2(3.14)r
R=0.5
Now that you have the radius, you can find the volume of the cone
Since you’re using 3.14 for pi, the volume will be this: V=1/3(3.14)r^2 (Height)
V= 1/3(3.14)(0.5)^2(1.5)
V=0.3925