Spotting a misleading similar-solid graphic

Spotting a misleading similar-solid graphic

Secondary 2
TGM Original Questions

A report uses two geometrically similar cylinders of diameters \(80\) cm and \(40\) cm to claim that output has fallen by one half. Explain why the graphic is mathematically misleading.

Solution:

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Answer:The picture represents an \(87.5\%\) fall (volume ratio \(1:8\)), not a \(50\%\) fall.

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