Math, asked by hjhhhhh6239, 1 year ago

The length breadth and height of a room are 12 m,10m,9m find the area of our walls of room

Answers

Answered by rebellonaomi
3

Answer:

216 m²

lateral surface area = 2(l+b)xh

2(12+10)9

2(22)9

18x22

216 m²



Answered by silentlover45
7

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\large\underline{Given:-}

  • Length ⇢ 12 m
  • Breadth ⇢ 10 m
  • Height ⇢ 9 m

\large\underline{To find:-}

  • find total surface area of the room...?

\large\underline{Solutions:-}

\: \: \: \: \: \star \: \: \: TSA \: \: of \: \: Cuboid \: \: \leadsto \: \: {2} \: {(lb \: + \: bh \: + \: hl)}

\: \: \: \: \: \leadsto {2} \: {({12} \: \times \: {10} \: + \: {10} \: \times \: {9} \: + \: {9} \: \times \: {12}) \: {cm}^{2}}

\: \: \: \: \: \leadsto \: \: {2} \: {({120} \: + \: {90} \: + \: {108}) \: {cm}^{2}}

\: \: \: \: \: \leadsto \: \: {2} \: \times \: {318} \: {cm}^{2}

\: \: \: \: \: \leadsto \: \: {636} \: {cm}^{2}

\: \: \: \: \: \star \: \: \: Hence, TSA \: \: of \: \: Cuboid \: \: = \: \: {636cm}^{2}.

\large\underline{More \: Information:-}

\: \: \: \: \: \star \: \: \: Volume \: \: of \: \: Cuboid \: \: = \: \: {l \: \times \: b \: \times \: h}.

\: \: \: \: \: \star \: \: \: Hence, TSA \: \: of \: \: Cuboid \: \: = \: \: {2} \: {(lb \: + \: bh \: + \: hl)}.

\: \: \: \: \: \star \: \: \: SA \: \: of \: \: Cuboid \: \: = \: \: {2} \: {(bh \: + \: hl)}.

\: \: \: \: \: \star \: \: \: Diagonal \: \: of \: \: Cuboid \: \: = \: \: {\sqrt{{l}^{2} \: + \: {b}^{2} \: + \: {h}^{2}}}.

\: \: \: \: \: \star \: \: \: Diagonal \: \: of \: \: faces \: \: of \: \: Cuboid \: \: = \: \: {\sqrt{{l}^{2} \: + \: {b}^{2}}} \: \: \: {\sqrt{{b}^{2} \: + \: {h}^{2}}} \: \: \: {\sqrt{{h}^{2} \: + \: {l}^{2}}}.

\: \: \: \: \: \star \: \: \: Height \: \: of \: \: Cuboid \: \: = \: \: \frac{volume}{base \: \: area}.

\: \: \: \: \: \star \: \: \: Area \: \: of \: \: Cuboid \: \: = \: \: \frac{volume}{height}.

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