Question

a door of dimensions 3m*1.5m is fitted in a wall of dimensions 8m*5.5m. Find the cost of White washing the wall at the rate of Rs. 12 per m² .​

Answer 1

Answer :-

The cost of white washing the wall at the rate of Rs. 12 per m² is Rs. 474.

Step-by-step explanation :-

To Find,

• The cost of white washing the wall at the rate of Rs. 12 per m²

Solution,

Given that,

• Dimensions of the door = 3m × 1.5m
• Dimensions of the wall = 8m × 5.5m

As we know that,

Area of rectangle = ( l × b )

Where,

• l = Length
• b = Breadth

Therefore,

The area of the door :-

= 3m × 1.5m

= 4.5m² ★

The area of wall including the door :-

= 8m × 5.5m

= 44m² ★

Therefore, area of the wall excluding the door,

Area of the wall including the door - Area of door,

= 44m² - 4.5m²

= 39.5m² ★

The cost of white washing the wall at the rate of Rs. 12 per m² is,

= 39.5 × 12

= 474 ★

Hence, The cost of white washing the wall at the rate of Rs. 12 per m² is Rs. 474.

Answer 2

Answer:

the cost of white aashing the wall at the rate of rs.12per m sq. is rs.474