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Direct and Inverse Proportion

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Question 22

86%

The sound intensity, $S$ , from a speaker is inversely proportional to the square of the distance, $r\,$ m, from the speaker.

$S\,$ is given by the formula: $S=144r2\displaystyle S = \frac{144}{r^2}$

Find the sound intensity when the speaker is 6 m away.

[2]

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Direct and Inverse Proportion Questions

GCSE
Maths
Direct and Inverse Proportion

189 exam-style questions on OCR GCSE Maths Direct and Inverse Proportion. Each one has a worked solution and a mark scheme showing where the marks go.

Direct and Inverse Proportion

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Direct and Inverse Proportion

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Question 22

86%

The sound intensity, $S$ , from a speaker is inversely proportional to the square of the distance, $r\,$ m, from the speaker.

$S\,$ is given by the formula: $S=144r2\displaystyle S = \frac{144}{r^2}$

Find the sound intensity when the speaker is 6 m away.

[2]

Video walkthrough

Direct and Inverse Proportion Questions

GCSE
Maths
Direct and Inverse Proportion

189 exam-style questions on OCR GCSE Maths Direct and Inverse Proportion. Each one has a worked solution and a mark scheme showing where the marks go.