O-LevelMathematicsMensuration4024/11 · May/June 2014 · Q101 Mark

A thin piece of wire is shaped into a figure five as shown. The shape has two straight sections of length 5.25 cm and 4.8 cm. The curved part is the arc of the major sector of a circle, radius 3 cm. The angle of the major sector is 280°. The total length of wire needed to make the figure is (a + bπ) cm. Find the values of a and b. [Figure 7]

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Mark scheme

Marking points from the official mark scheme (May/June 2014). The mark or mark type is shown in brackets.

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Topic: Mensuration, O-Level Mathematics (syllabus 4024). Structured question, 1 mark.
Source: O-Level Mathematics, May/June 2014 Paper 1 Variant 1, question 10.

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