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MATH GRADE 8 15. a) and b)

MATH GRADE 8 15. a) and b)-example-1

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Answer: 1300 cm³

a) Find the volume of the entire rectangle and subtract the volume of the missing section. Volume = L · w · h

Solid = Rectangle - Missing section

= L · w · h - L · w · h

= 16 · 10 · 10 - 10 · 6 · 5

= 1600 - 300

= 1300

b) Find the volume of each section of the rectangle (base, left wing right wing) and add them. Volume = L · w · h

Solid = Base + Left wing + Right wing

= L · w · h + L · w · h + L · w · h

= 16 · 10 · 5 + 5 · 10 · 5 + 5 · 10 · 5

= 800 + 250 + 250

= 1300

The answer from (a) is the same as (b)
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