Question

find the lateral surface area in centimetre square of a cube whose side measure 1.8 decimal​

Answer 1

$\huge{\green{\underline{\underline{Answer:-}}}}$

Given:

Side of cube = 1.8 cm

1.8 decimal means fraction 9/5

We can solve either by using 1.8 or 9/5

To find:

Lateral surface area of cube = ?

Solution:

$\\ \\ Lateral \: \: surface \: \: area \: \: of \: \: cube \\ \\ = 4 \: a { }^{2} \\ \\ where \: a \: = side \: of \ \: cube$

$\\ \\ Lateral \: surface \: area \: of \: cube \: \\ \\ = 4 \times (1.8) {}^{2} \\ \\ = 4 \times 3.24 \\ \\ = 12.96 \: cm {}^{2}$

Required answer:

Thus, lateral surface area of cube is 12.96 cm²

Knowledge booster:

# Lateral surface area of cube is area of four sides of cube. So the formula becomes 4a²

# Surface area of cube = 6a² and volume of cube = a³

# Solve more such questions to get good hold on it

Answer 2

$\huge{\blue{\bold{\underline{\underline{Answer :}}}}}$

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$\large\underline{\green{\bf Given :-}}$

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• Side of cube = 1.8 cm

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$\large\underline{\red{\bf To \: Find :-}}$

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• Lateral surface area of cube

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$\large\underline{\orange{\bf Solution :-}}$

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We know that ,

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$\underline{\bold{\texttt{Lateral surface area of cube :}}}$

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➠ 4(s)² ⚊⚊⚊⚊ ⓵

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Where ,

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• s = Side

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$\underline{\bold{\texttt{Lateral surface area of cube in this case :}}}$

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• s = 1.8

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⟮ Putting the value in ⓵ ⟯

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➜ 4(s)²

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➜ 4(1.8)²

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➜ 4(3.24)

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➨ 12.96 sq. cm.

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• Hence the lateral surface area of cube is 12.96 sq. cm.

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Additional information

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Total surface area of cube

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• 6a²

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Where,

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➻ a = Side

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Volume of cube

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• $\sf a ^3$

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➻ a = Side

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Properties of cube

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• It has all its faces in a square shape.

• All the faces or sides have equal dimensions.

• The plane angles of the cube are the right angle.

• Each of the faces meets the other four faces.

• Each of the vertices meets the three faces and three edges.

• The edges opposite to each other are parallel.

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