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JAMB Mathematics 2024 Paper

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Question : 3

Total: 50

y is inversely proportional to x and y = 4, when x =

\frac{1}{2}

, find x when y = 10

2
10
$\frac{1}{5}$
$\frac{1}{10}$

Solution:

y ∝ $\frac{1}{x}$

y = $\frac{k}{x}$

y = 4, x = $\frac{1}{2}$ , find x when y = 10

4 = $\frac{k}{\frac{1}{2}}$

k = 2

Therefore, x = $\frac{2}{10} = \frac{1}{5}$

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