Neco 2021 Mathematics Question 39
Practice objective / multiple choice question 39 from the 2021 Neco Mathematics examination.
The time \(T\) (in minutes) required to paint a wall varies directly with its area \(A\) (in \(\text{m}^2\)) and inversely with the effective number of painters \(E\). The effective number of painters is given by \(E = P - 0.1(P-1)P\), where \(P\) is the actual number of painters. If \(2\) painters can paint an \(18\ \text{m}^2\) wall in \(45\) minutes, how many minutes will it take \(4\) painters to paint a \(27\ \text{m}^2\) wall? Give your answer to one decimal place.
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About This Question
This is Neco 2021 Mathematics Question 39. It is one of the objective questions from the 2021 Neco Mathematics examination.
Difficulty level: Medium .
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