Question

If the four walls of a room are to be painted with dimensions l=10m b=20 m and h=12m. What is the area in sq metres to be painted

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Answer 1

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If the four walls of a room are to be painted with dimensions l=10m, b=20 m and h=12m. What is the area in sq metres to be painted?

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➡720m² is the area in sq metres to be painted.

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• Length of wall = 10m
• Breadth of wall = 20m
• Height of wall = 12m

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• Area of walls to be painted

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L.S.A of cuboid =

$\bf \purple{2h(l + b)}$

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In this question, we have to find area of all four walls that means we have to find Lateral Surface area of room

So, let's start

Length = 10m

Breadth = 20m

Height = 12m

$\bf L.S.A \: of \: cuboid =2h(l + b)$

$\bf \implies 2 \times 12(10 + 20)$

$\bf \implies 24 \times 30$

$\bf \implies 720 {m}^{2}$

Therefore, Area of room to painted is 720m².

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