Question

8. A door of length 2 m and breadth lm is fitted in a wall. The length of the
wall is 4.5 m and the breadth is 3.6 m (Fig11.6). Find the cost of white
washing the wall, if the rate of white washing the wall is 20 per m².​

Answer 1

Step-by-step explanation:

length of door=2m

breadth of door=lm{unidentified}

=> wall 4.5m and breadth 3.6m

prise of wite washing

=₹20perm²

now area of door

={2×lm}m²

=2lm m²

now area of wall

={4.5×3.6}m²

=16.2

now wite qashing prise to wall

=2lm-16.2

=not defined

PLEASE CHECK THE VALUE OF LM

HOPE IT HELPS MARK AS BRAINLIST

Answer 2

$\large\begin{gathered} {\underline {\red {{\sf \: Given }}}}\end {gathered}$

• Length of the door = 2 metre
• Breadth of the door = 1 metre
• Length of the wall = 4.5 metre
• Breadth of the wall = 3.6 metre
• Rate of white washing is Rs 20 per m²

$\large\begin{gathered} {\underline {\red {{\sf \: To \: Find }}}}\end {gathered}$

• Cost of white washing the wall

$\large\begin{gathered} {\underline {\green {{\sf \: solution}}}}\end {gathered}$

Area of wall = L × B

$= 4.5m \times 3.6m$

$= 16.2 \: m ²$

Area of Door = l × b

$= 2m \times 1m$

$= 2m²$

Area to be white washed = Area of complete wall - area of door

$= 16.2m² - 2m²$

$= 14.2m²$

Cost of white washing = Area × Rate

$= 14.2m² \times \frac{₹20}{m²}$

$= ₹284$

Cost of white washing the wall is ₹284