Question

A door of length is 2m and breadth 1m fitting to wall is 4.5m and breadth is 3.6m.find the length of white washing wall if the rate of white washing the wall Rs20

Answer 1

Answer:

l=2cm,b=1 m=3

fitting to wall is 4.5 and breath =3 .6m =81

Answer 2

Answer:

Given :

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• Length of wall = 4.5m
• Breadth of wall = 3.6m
• Length of door = 2m
• m Breadth door = 1m

To Find :

Area on the wall to be painted and what will be the cost at the rate of ruppes

${ \sf\bold\blue{20 \: per \: {m}^{2}}}$

$\huge{\green{Point \: to \: focus}}$

$1. \: \: {\sf{\red{area \: to \: painted = area \: of \: wall -area \: of \: door }}}$

${ \sf{\red{area \: of \: wall = length \times breadth}}} \\ { \sf{\red{area \: of \: wall = 4.5\times 3.6}}} \\ { \sf{\red{area \: of \: wall = 16.2m²}}}$

${ \sf{\red{area \: of \: door = length \times breadth}}} \\ { \sf{\red{area \: of \: door= 2m\times 1m}}} \\ { \sf{\red{area \: of \:door \: =2m²}}} \\ { \sf{\red{area \: of \: wall \: to \: painted=16.2 {m}^{2} - 2m² = 14. {m}^{2} }}} \\ { \sf{\red{rate \: of \: painting \: 14.2 {m}^{2} =14.2m² \times 20 = 284}}}$

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