JAMB Mathematics 2020 Paper

Concept:The problem involves calculating time in a simple interest question using the formula $I = \frac{PRT}{100}$.Explanation:From the question, the principal $P = N225.00$, the simple interest $I = N27.00$, and the rate $R = 4\%$ per annum. The time is given as $T = x$ years. Substitute these values into the simple interest formula: $27 = \frac{225 \times 4 \times x}{100}$ First multiply $225$ by $4$ to get $900$: $27 = \frac{900x}{100}$ Simplify $\frac{900}{100}$ to $9$: $27 = 9x$ Divide both sides by $9$ to solve for $x$: $x = \frac{27}{9} = 3$ Therefore, the time required is $3$ years.Answer:A. 3