Question

The perimeter of a rectangular window is 13 m. Its length is 4 m. Find its area. Find the cost of fixing
a glass on the window, if the rate of the glass is 325 per sq. m.​

Answer 1

Answer:

Area of window - 10 m² and cost of fixing glass - rupees 3,250.

Step-by-step explanation:

Perimeter of rectangle = 2(L+B)

13 = 2(4+B)

13/2 = 6.5 = (4+B)

now, 6.5-4 = 2.5 m Ans.

Now cost of fixing glass per m² = 325

so cost of fixing glass 10 m = 325×10

= 3250 Àns

Answer 2

Given :-

For rectangular window :

$\sf{\rightarrow \ Perimeter = 13m}\\ \sf{\rightarrow \ Length = 4m}\\ \sf{\rightarrow \ Cost \ of \ fixing \ a \ glass \ on \ the \ window \ at \ the \ rate \ of = 325 / m^{2}}$

To find :-

$\sf{\rightarrow \ Area\ of \ rectangular \ window}\\ \sf{\rightarrow \ Cost \ of \ fixing \ a \ glass \ on \ the \ window }$

Formula to be used :-

$\sf{\rightarrow \ Perimeter = 2 \times (Length + Breadth)}$

$\rightarrow \ \sf{Area = Length \times Breadth}$

Solution :-

To find the area of rectanglular window , we first have to find out the  breadth of the rectangular window .

∴ Perimeter = 2 × (Length + Breadth)

Let breadth be b .

$\implies \sf{13 = 2 \times (4+b)}$

$\implies \sf{13 = 8 + 2b}$

$\implies \sf{2b = 13 - 8}$

$\implies \sf{b = \frac{5}{2} = 2.5m}$

   

             $\boxed{\sf{Breadth =2.5m}}$

∴ Area = Length × Breadth

$\sf{\implies \ Area = 4 \times 2.5 = 13m^{2}}$

                $\boxed{\sf{Area = 13m^{2}}}$

Now , the cost of fixing the glass on the rectangular window

              $\sf{ = Rs. (13 \times 325)}$

              $= \sf{Rs. 4225}$

$\boxed{ \sf{Cost \ of \ fixing \ the \ glass \ on \ a \ window = Rs.4225}}$

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