Question 24

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waecmaths question: 

A rectangle has length xcm and width (x – 1)cm. if the perimeter is 16cm, find the value of xcm

Option A: 

$3\tfrac{1}{2}cm$

Option B: 

4cm

Option C: 

$4\tfrac{1}{2}cm$

Option D: 

5cm

waecmaths solution: 

$\begin{align}  & p=2(l+b) \\ & 2(x+x-1)=16 \\ & 4x-2=16 \\ & 4x=14 \\ & x=\frac{7}{2}=3\tfrac{1}{2}cm \\\end{align}$

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