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secondary 2 | Maths
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Shanice
Shanice

secondary 2 chevron_right Maths chevron_right Singapore

Can anyone help me with 11aii and 11bii?

Date Posted: 2 months ago
Views: 33
Eric Nicholas K
Eric Nicholas K
2 months ago
Your first step working in a (i) is incorrect

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Eric Nicholas K
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Eric Nicholas K
Eric Nicholas K
2 months ago
The first part has nothing to do with Pythagoras Theorem. What you attempted to do was basically form a triangle with the base equivalent to the diameter of the circle (2 m). height equivalent to the height of the frustum (1.5 m). Pythagoras Theorem attempts to find the slanted length of this triangle, not the height of the top cone. It's just a coincidence that both answers are 2.5 m.