Make R the subject of the formula if T = (frac {KR^2 + M}{3})

A.
(sqrtfrac{3T – K}{M}) 
B.
(sqrtfrac{3T – M}{K}) 
C.
(sqrtfrac{3T + K}{M}) 
D.
(sqrtfrac{3T – K}{M})
Correct Answer: Option B
Explanation
T = (frac{KR^2 + M}{3})
3T = KR^{2} + M
KR^{2} = 3T – M
R^{2} = (frac{3T – M}{K})
R = (sqrtfrac{3T – M}{K})