t = mr^2/3
Divide both sides by r^2/3
m = t / r^2/3
Answer:
[tex]\large\boxed{m=\dfrac{3t}{r^2}}[/tex]
Step-by-step explanation:
[tex]\dfrac{mr^2}{3}=t\qquad\text{multiply both sides by 3}\\\\mr^2=3t\qquad\text{divide both sides by}\ r^2\\\\m=\dfrac{3t}{r^2}[/tex]