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WAEC Mathematics 2017 Paper

Question : 33

Total: 49

\;\frac{1}{2}

Solution:

Concept:

Simple interest remains constant each year, so first find the annual interest and the principal saved.

Explanation:

Interest for 5 years is N500.00.

So, annual interest

= \frac{500}{5} = \text{N100.00}

Let the principal be

P

Annual interest

= P \times \frac{2.5}{100} = 100

Thus,

P = \frac{100 \times 100}{2.5} = \text{N}4{,}000.00

After 6 years, total simple interest

= 6 \times 100 = \text{N600.00}

Total amount due

= P + \text{interest} = 4{,}000 + 600 = \text{N}4{,}600.00

Answer:

N4,600.00 (Option D).

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