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Rectilinear Figures, SM-Bank 003 MC

The table shows the dimensions of four different rectangles in centimetres.

Rectangle Length (cm) Width (cm)
1 9 5
2 10 8
3 14 2
4 18 10

 
Which rectangle has a perimeter of 28 centimetres?

  1. Rectangle 1
  2. Rectangle 2
  3. Rectangle 3
  4. Rectangle 4
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\(A\)

Show Worked Solution

\(\text{Consider rectangle 1}\)

\(\text{Perimeter}\) \(= 2\times \text{length} + 2\times \text{width}\)
  \(= (2\times 9) + (2\times 5)\)
  \(=28\ \text{cm}\)

  
\(\therefore\ \text{Rectangle 1 has a perimeter of 28 cm.}\)

\(\Rightarrow A\)