Math, asked by Anonymous, 9 months ago

the length breadth and height of a room are 5m 4m and CM respectively find the cost of whitewashing the walls of the room and the ceiling @ rate 750 per metre square​

Answers

Answered by sagarnishu12345
11

Step-by-step explanation:

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Attachments:
Answered by silentlover45
3

\underline\mathfrak{Questions:-}

  •  the \: \: length \: \: breadth \: \: and \: \: height \: \: of \: \: a \: \: room \: \: are \: \: 5 \: m \: \: 4 \: m \: \: and \: \: CM \: \: respectively \: \:  find \: \: the \: \: cost \: \: of \: \: white \: \: washing \: \: the \: \: walls \: \: of \: \: the \: \: room \: \: and \: \: the \: \: ceiling \: \: @ \: \: rate \: \: 750 \: \: per \: \: metre \: \: square.

\underline\mathfrak{Given:-}

  • \: \: \: \: \: Length \: \: of \: \: the \: \: room \: \: = \: \: 5 \: m.

  • \: \: \: \: \: Breadth \: \: of \: \: the \: \: room \: \: = \: \: 4 \: m.

  • \: \: \: \: \: Height \: \: of \: \: the \: \: room \: \: = \: \: 3 \: m.

\underline\mathfrak{To \: \: Find:-}

  • \: \: \: \: \: find \: \: the \: \: cost \: \: of \: \: white \: \: washing \: \: the \: \: walls \: \: of \: \: the \: \: room \: \: and \: \: the \: \: ceiling ?

\huge\underline\mathfrak{Solutions:-}

\: \: \: \: \: \underline{Area \: \: to \: \: be \: \: white \: \: wasted \: \: = \: \: Area \: \: of \: \: wall \: \: + \: \: Area \: \: of \: \: ceiling.}

\: \: \: \: \: Area \: \: of \: \: wall \: \: of \: \: room \: \: = \: \: 2 \: (l \: + \: b) \: h

\: \: \: \: \: \leadsto \: \: 2 \: (5 \: + \: 4) \: 3

\: \: \: \: \: \leadsto \: \: 2 \: × \:  9 \: × \: 3

\: \: \: \: \: \leadsto \: \: 54 \: {m}^{2}

\: \: \: \: \: Area \: \: of \: \: ceiling \: \: = \: \: l \: × \: b

\: \: \: \: \: \leadsto \: \: 5 \: × \: 4

\: \: \: \: \: \leadsto \: \: 20

\: \: \: \: \: Total \: \: area \: \: of \: \: wall \: \: of \: \: room \: \: and \: \: ceiling \: \: = \: \: 54 \: + \: 20

\: \: \: \: \: \leadsto \: \: 74 \: {m}^{2}

\: \: \: \: \: Cast \: \: of \: \: while \: \: wasing \: \: the \: \: wall \: \: room \: \: and \: \: ceiling \: \: = \: \: 74 \: × \: 7.50

\: \: \: \: \: \leadsto \: \: 555 \: {m}^{2}

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\huge\underline\mathfrak{Extra \: \: Information:-}

  • \: \: \: \: \: Volume \: \: = \: \: Length \: × \: Breadth \: × \: Height

  • \: \: \: \: \: Surface \: \: Area \: \: = \: \: 2 \: (lb \: + \: bh \: + \: hl)

  • \: \: \: \: \: Diagonal \: \: = \: \: \sqrt{(lb \: + \: bh \: + \: hl)}

  • \: \: \: \: \: Perimeter \: \: = \: \: 2 \: (l \: + \: b)

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