Math, asked by jrmundel01, 11 months ago

A door of length 2 m and breadth 1m is fitted in a wall. The length
wall is 4.5 m and the breadth is 3.6 m .Find the cost of white
washing the wall, if the rate of white washing the wall is 720 per m2​

Answers

Answered by azil91
4

Step-by-step explanation:

Area of door = 2 * 1 = 2 m2

Area of wall =4.5 * 3.6 = 16.25 m2

So area to be white washed = Area of wall - Area of the door

=16.25-2 =14.25 m2

Cost for white washing the entire wall = 14.25 * 720 = 10260

Answered by LostPrincess
1

Answer:

Answer:

\huge\star{\underline {\underline{\pink{Q}{uestion}}}}\star\:

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 white washing the wall, if the rate of white washing the wall is 20 per m².

\huge\star{\underline{\underline{\pink {A}{nswer}}}}\star\:

White washing of the wall has to be white washed excluding the area of door.

\red {=》} Area \:of \:the\: wall\: including\: door = length × breadth\\ \red {=》} 4.5 m. × 3.6 m. = 16.2 m²\\ \red {=》} Area of rectangular door = length × breadth\\ \red {=》} 2m. × 1m. = 2 m² \\\huge{\underline{\underline{Now,}}}

Area of wall excluding door = Area of wall including door - Area of rectangular door

\red {=》}16.2 m² - 2 m²\\ \red {=》} 14.2 m²\\ \huge {\underline {\underline {Given,}}}

The rate of white washing of 1 m² the wall = 20

The rate of white washing 14.2 m² the wall = 20 × 14.2

\red {===》} 284\\ \huge\green{\underline {\underline{\mathtt {Final\: Answer}}}}

The cost of white washing

of the wall excluding door

is 284

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