Triangular-prism product dimensions

Triangular-prism product dimensions

Secondary 2
4 marks
TGM Original Questions

Optional extension

A product is a prism with an equilateral-triangle base. Its length \(l\) cm is inversely proportional to the square of the base side \(w\) cm. A product with \(w=2\) cm has length \(18\) cm.

  1. Give an equation connecting \(l,w\).[2]
  2. Find the length when \(w=3\) cm.[2]

Solution:

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Answer:(i) \(l=\dfrac{72}{w^2}\) (ii) \(8\) cm.

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