Neco Model Questions Vol1 2019 Mathematics Question 29
Practice objective / multiple choice question 29 from the 2019 Neco Model Questions Vol1 Mathematics examination.
The intensity \(I\) (lux) of light at a distance \(d\) (metres) from a source varies directly as the power \(P\) (watts) of the source and inversely as the square of the distance. When \(P=50\) W and \(d=2\) m, the intensity is \(200\) lux. What power is required to obtain an intensity of \(150\) lux at a distance of \(3\) m? Give your answer to three decimal places.
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About This Question
This is Neco Model Questions Vol1 2019 Mathematics Question 29. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Mathematics examination.
Difficulty level: Medium .
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