4MA1/1F Jun 2023, Question 7: Composite Perimeter, Area and Volume
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 3 marks
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The question, in short
Three 10 cm by 3 cm rectangles form an arch: two upright with a third horizontal between their tops. Work out the perimeter of the combined shape.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 3 marks
- 1Each rectangle has perimeter 2 × (10 + 3) = 26, so three give 78
- 2Each upright joins the top rectangle along 3 cm, hiding 3 cm on both shapes
- 3Two joins hide 2 × (3 + 3) = 12 cm
- 4Perimeter = 78 − 12 = 66
Answer66
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