A door of length 2 metre and breadth 1.5 m is on a wall the length of the wall is 4.5 M and breadth is 3.6 M find the cost of whitewashing the wall at the rate of 20 rupees per metre square

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Solution

Dear student,
$A r e a o f d o o r = l \times b = 2 \times 1.5 = 3 m^{2} A r e a o f w a l l w i t h d o o r = L \times B = 4.5 \times 3.6 = 16.2 m^{2} A r e a o f w a l l w i t h o u t d o o r = A r e a o f w a l l w i t h d o o r - A r e a o f d o o r = 16.2 - 3 = 13.2 m^{2} C o s t o f w h i t e w a s h i n g t h e w a l l = 13.2 \times 20 = R s 264$
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Q. A door of length

2 m

and breadth

1 m

is fitted in a wall. The length of the wall is

4.5 m

and breadth is

3.6

. Find the cost of white washing the wall, if the rate of white washing the wall is

R s 20

per

m^{2}

A door of length $2 m$ and breadth $1 m$ is fitted in a wall. The length of the wall is $4.5 m$ and the breadth is $3.6 m$ . Find the cost of the white washing the wall, if the rate white washing the wall is $R s . 20$ per $m^{2}$ .

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A door of length 2 metre and breadth 1.5 m is on a wall the length of the wall is 4.5 M and breadth is 3.6 M find the cost of whitewashing the wall at the rate of 20 rupees per metre square

Dear student, Area of door=l×b=2×1.5=3 m2Area of wall with door=L×B=4.5×3.6=16.2 m2Area of wall without door=Area of wall with door-Area of door=16.2-3=13.2 m2Cost of white washing the wall=13.2×20=Rs 264 Regards