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Secondary 1 | Maths
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Date Posted: 4 years ago
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Hope this helps
Date Posted:
4 years ago
Do you mind explaining step by step?
Top rectangle
Perimeter = 18
So, 2 LENGTH + 2 BREADTH =18
Divide all by 2,
Length + breadth = 9
Given length or breadth or height must be more than 2.
So, if length =6, breadth must be 3
Or length =4, breadth must be 5.
Also cuboid is made up of 324 -1cm cube, so volume of cuboid is 324 cm³
Volume = length x breadth x height.
We take length =4 and length = 5
4×5 × height = 324
Height = 324 ÷20 = 16.2cm (rejected due to cuboid is made up of 1 cm cube, should not have decimal).
So we use length =6, breadth =3
Volume = 324
6× 3 ⅹ height=324
Height = 324÷ 18 =18 cm.
Perimeter = 18
So, 2 LENGTH + 2 BREADTH =18
Divide all by 2,
Length + breadth = 9
Given length or breadth or height must be more than 2.
So, if length =6, breadth must be 3
Or length =4, breadth must be 5.
Also cuboid is made up of 324 -1cm cube, so volume of cuboid is 324 cm³
Volume = length x breadth x height.
We take length =4 and length = 5
4×5 × height = 324
Height = 324 ÷20 = 16.2cm (rejected due to cuboid is made up of 1 cm cube, should not have decimal).
So we use length =6, breadth =3
Volume = 324
6× 3 ⅹ height=324
Height = 324÷ 18 =18 cm.
Thankuuu
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