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Year 8 Maths Volume

Composite Shapes for Volume

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Questions
Question 1
201898

A steel bracket is a prism 20 cm long. Its cross-section is the shaded L shape. Both arms are 1.5 cm thick.

L-shaped bracketSteel bracket: L-shaped cross-section (shaded) 6 cm wide and 5 cm tall, arms 1.5 cm thick; 20 cm long 6 cm 5 cm 1.5 cm 20 cm
(i) Find the area of the cross-section.
(ii) Find the volume of the bracket.
Part a:
14.25
 \(~\text{cm}^2\) (2 d.p) 1 mark
Part b:
285
 \(~\text{cm}^3\) 1 mark

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