Question

What is the cost of painting (Rs 10/ sq m) four walls of a rectangular room with length 10m, breadth 4m, height 6m​

Answer 1

$\text{ \large \underline{ \orange{Question:-}}}$

• What is the cost of painting (Rs 10/ sq m) four walls of a rectangular room with length 10m, breadth 4m, height 6m

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

• Length 10m,

• Breadth 4m,

• Height 6m .

$\text{ \large \underline{ \pink{To Find:-}}}$

• What is the cost of painting ?

$\text{ \large \underline{ \red{Solution:-}}}$

$\text{area to be painted = area of four walls +area of rectangle (roof)}$

$\sf = 2h(l+b) + lb \\</p><p></p><p>\sf = 2 \times 6( 10 + 4) + 10 \times 4\\</p><p> \sf = 12 ( 14 ) + 40\\</p><p>\sf = 168 + 40\\</p><p>\sf = 208$

$\text{ \bf \: the cost of painting (Rs 10/ sq m)} \\ \sf \to \:208 \times 10 \\ \sf \to \: 2080$

$\text{\blue{the cost of painting} \sf =2080}$

$\sf \bigstar\large \underline{ \purple{more \: information:-}}$

• $\sf Tatal \:surface \:area \:=\: {2(lb+bh+lh)}^{2}$

• $\sf Lateral\: surface \:area\:= {2(l+b)\times h}^{2}$

• $\sf Area \:of\: four \:walls\:= {2(l+b)\times h }^{2}$

• $\sf Volume \:of \:cube \:={a}^{3}$

Answer 2

Step-by-step explanation:

Question:-

What is the cost of painting (Rs 10/ sq m) four walls of a rectangular room with length 10m, breadth 4m, height 6m

\text{ \large \underline{ \green{Given:-}}}

Given:-

Length 10m,

Breadth 4m,

Height 6m .

\text{ \large \underline{ \pink{To Find:-}}}

To Find:-

What is the cost of painting ?

\text{ \large \underline{ \red{Solution:-}}}

Solution:-

\begin{gathered}\text{area to be painted = area of four walls +area of rectangle (roof)} \\\end{gathered}

area to be painted = area of four walls +area of rectangle (roof)

\begin{gathered}\sf = 2h(l+b) + lb \\ \sf = 2 \times 6( 10 + 4) + 10 \times 4\\ \sf = 12 ( 14 ) + 40\\ \sf = 168 + 40\\ \sf = 208\end{gathered}

=2h(l+b)+lb

=2×6(10+4)+10×4

=12(14)+40

=168+40

=208

\begin{gathered}\text{ \bf \: the cost of painting (Rs 10/ sq m)} \\ \sf \to \:208 \times 10 \\ \sf \to \: 2080\end{gathered}

the cost of painting (Rs 10/ sq m)

→208×10

→2080

\text{\blue{the cost of painting} \sf =2080}the cost of painting =2080

\sf \bigstar\large \underline{ \purple{more \: information:-}}★

moreinformation:−

\sf Tatal \:surface \:area \:=\: {2(lb+bh+lh)}^{2}Tatalsurfacearea=2(lb+bh+lh)

2

\sf Lateral\: surface \:area\:= {2(l+b)\times h}^{2}Lateralsurfacearea=2(l+b)×h

2

\sf Area \:of\: four \:walls\:= {2(l+b)\times h }^{2}Areaoffourwalls=2(l+b)×h

2

\sf Volume \:of \:cube \:={a}^{3}Volumeofcube=a

3