JAMB Mathematics 2011 Paper

Concept:Rearrange a literal equation by using inverse operations to isolate the required subject.Explanation:Start with the given equation:$$T = \frac{KR^2 + M}{3}$$Multiply both sides by $3$ to remove the denominator:$$3T = KR^2 + M$$Subtract $M$ from both sides:$$3T - M = KR^2$$Divide both sides by $K$:$$R^2 = \frac{3T - M}{K}$$Take the square root of both sides, choosing the positive root for the subject:$$R = \sqrt{\frac{3T - M}{K}}$$This matches option B.Answer:$$R = \sqrt{\frac{3T - M}{K}}$$Correct option: B.