Volume and Missing Dimension SO 4, 5

1
VolumeandMissing DimensionSO 4, 5
Math Gd. 6 Unit 3
Measurement Shape and Space

• By
• Vernon Savoury

2
Review

• The formula for finding the volume of a
  rectangular solid is v lwh.
• It means length (l) x width (w) x height (h).
• Volume is measured in cubic units.

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Example
Length (l) 8 m Width (w) 4 m Height (h) 12 m
12 m
V lwh 8 m x 4 m x 12 m 384 m3
4 m
8 m
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What is the missing dimension?
The missing dimension is the length (l).
V 384 m3

• To find the length
• Divide the volume by the width.
• 384 m3 4 m 96 m2
• Divide this answer by the height.
• 96 m2 12 m 8 m

12 m
4 m
l

• Using a calculator
• 384 4 12 8

The length (l) of the rectangular solid is 8 m.
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What is the missing dimension?
The missing dimension is the length (l).
V 384 m3
To find the length
L v _
12 m
wh
384_
12 x 4
4 m
384_
l
48
8 m
The length (l) of the rectangular solid is 8 m.
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What is the missing dimension?
V 120 cm3
V 20,000 m3
?
10 m
20,000 40 10
8 cm
40 m
120 8 5
?
5 cm
3 cm 24 mm 50 m
V 5184 mm3
12 mm
18 mm
5184 12 18
?
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Practice
4 10 9
120 7 1680
40 8 6