Your radius would have to be 1.91
Solve for x (isolate/get x by itself)
Add 5 on both sides

Subtract 1/4x on both sides

Make the denominators the same of the fractions in order to combine them. Multiply 2 to the top and bottom of 1/4x

Multiply 8 on both sides

-16 = x
Answer:
0.3 kg
Step-by-step explanation:
I hope it helps, have a good day