Exam-Style Question on Similarity
A mathematics exam-style question with a worked solution that can be revealed gradually
Question id: 147. This question is similar to one that appeared on a GCSE Higher paper (specimen) for 2017. The use of a calculator is allowed.
(a) Victor estimates the height of a flag pole by holding a ruler vertically so the height of the flag pole is exactly covered by the ruler when he is standing 240 centimetres from the flag pole.
The ruler is 30 cm long.
The horizontal distance of his eyes from the ruler is 40cm.
Calculate an estimate of the height of the flag pole.
(b) Give two reasons why this method may not be suitable to estimate the height of a very tall building.
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