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JAMB Mathematics 2019 Paper

Question : 33

Total: 73

Solution:

Concept:

Simple interest is found using the principal, rate, and time in the formula

I = \frac{P R T}{100}

Explanation:

Given: principal

P = 8550

, time

T = 3

years, simple interest

I = 4890

, and rate

R = x\%

Substitute the values into the formula:

4890 = \frac{8550 \times x \times 3}{100}

Make

x

the subject of the equation:

x = \frac{4890 \times 100}{8550 \times 3}

Simplify the expression:

x = \frac{489000}{25650}

x = 19.06\%

To the nearest whole number,

x = 19\%

Answer:

19\%

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