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BECE Mathematics 2019 Paper

Question : 37

Total: 40

Solution:

Concept:

Simple interest is calculated on the principal for a given time. The rate can be found by rearranging the simple interest formula.

Explanation:

The simple interest formula is

S.I. = \frac{P \times R \times T}{100}

Here,

S.I. = 45

P = 450

, and

T = 4

Make

R

the subject:

R = \frac{S.I. \times 100}{P \times T}

Substitute the given values:

R = \frac{45 \times 100}{450 \times 4}

R = \frac{4500}{1800}

R = 2.5\%

Answer:

The rate of interest is

2.5\%

(Option A).

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