Triangular-prism product dimensions

Triangular-prism product dimensions

Secondary 2
TGM Original Questions

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. Find the length when \(w=3\) cm.

Solution:

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

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