Question

A door of length 2m and breadth 1m is fitted in a wall the length of the wall is 4.5 m and the breadth is 3.6m find the cost of white washing the wall if the rate of white washing the wall is rupees 20 per m2.​

Answer 1

$\huge \underline \mathbb {SOLUTION:-}$

AnsWer:

• The cost of white washing the wall is ₹284.

Given:

• A door of length 2m and breadth 1m is fitted in a wall the length of the wall is 4.5 m and the breadth is 3.6m.

Need To Find:

• The cost of white washing the wall if the rate of white washing the wall is rupees 20 per m² = ?

Explaination:

Area of rectangular door

➠ Length × Breadth

➠ 2m × 1m

➠ 2m²

Area of wall including door

➠ Length × Breadth

➠ 4.5m × 3.6 m

➠ 16.2m²

Now, area of wall including door

• Area of wall including door - Area of door

➠ 16.2 - 2

➠ 14.2 m²

Since, The rate of white washing of 1m² the wall = ₹20

Therefore:

The rate of white washing 14.2m² the wall

➠ 20 × 14.2

➠ ₹284

• Thus, the cost of white washing the wall excluding the door is ₹284.

$\setlength{\unitlength}{1.0 cm}}\begin{picture}(12,4)\thicklines\put(1,1){\line(1,0){6.5}}\put(1,1.1){\line(1,0){6.5}}\end{picture}$

Answer 2

Answer:

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