4MA1/1F Jun 2021, Question 18: Composite Perimeter, Area and Volume
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 1F (Foundation) · Calculator · 4 marks
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The question, in short
A five-sided shape ABCDE has area 91.8 cm², with AB = x cm, BC = 8 cm, AE = 14 cm, ED = 13 cm and right angles at A, B and E. Find x.
Summarised in our own words. Use the official paper for the exact wording and the diagram.
Solution · 4 marks
- 114x + 6 × 0.5 × (13 − x) = 91.8
- 214x + 3(13 − x) = 91.8
- 314x + 39 − 3x = 91.8
- 411x + 39 = 91.8
- 511x = 52.8
- 6x = 4.8
Answer4.8
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