Math, asked by tejinder24275, 1 year ago

A cubical box without a lid has a length of 30 centimeter. Find the cost of painting the inside and outside of the box at rupees 5.50 per metre square.


MrCoder: 4.95

Answers

Answered by TooFree
55

The box is without a lid

⇒ number of faces to paint = 10


Convert 30 cm to m:

30 cm = 0.3m


Find the area of 1 face:

area = length x length

area = 0.3 x 0.3 = 0.09 m²


Find the area of 10 faces:

1 face = 0.09 m²

10 faces = 0.09 x 10 = 0.9 m ²


Find the cost of the painting:

1 m² = Rs 5.50

0.9 m² = 5.5 x 0.9 = Rs 4.95


Answer: The cost of painting is Rs 4.95



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rafiq36: answer is correct
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Anonymous: Awesome answer
Answered by Anonymous
52
\color{blue}{ \boxed{ \bold{ \underline{thanks \: for \: asking \: this \: question}}}} \\ \\ \\ \color{green}{ \boxed{ \bold{ \underline{good \: morning}}}} \\ \\ \\ \color{blue}{ \boxed{ \bold{ \underline{namskar}}}} \\ \\ \\ \color{violet}{ \boxed{ \bold{ \underline{required \: answer}}}}


\color{blue}{ \boxed{ \bold{ \underline{here -number \: of \: faces \: to \: paint = 10}}}}


\color{in}{ \boxed{ \bold{ \underline{now > we \: know \: that \: 1 \: metre = 100 \: cm}}}}


\color{indigo}{ \boxed{ \bold{ \underline{now - < convert \: given \: 30 \: cm \: to \: metre}}}}


\color{maroon}{ \boxed{ \bold{ \underline{ \frac{30}{100} = 0.3 \: metre}}}}


\color{blue}{ \boxed{ \bold{ \underline{area \: of \: faces = length \times breadth}}}}


\color{yellow}{ \boxed{ \bold{ \underline{0.3 \times 0.3 = 0.09}}}}

\color{violet}{ \boxed{ \bold{ \underline{area \: of \: required \: 10 \: faces = 0.09 \times 10 = 0.9}}}}


\color{blue}{ \boxed{ \bold{ \underline{according \: to \: the \: question}}}}



\color{yellow}{ \boxed{ \bold{ \underline{cost \: of \: fencing = )5.50 \times 0.9 = 4.95}}}}


\color{grey}{ \boxed{ \bold{ \underline{dhanyavaad}}}}


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