To find the cost of painting a wall, we need to find the perimeter of the wall.

True

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False

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Solution

The correct option is B
False

Perimeter is the measure of distance of the boundary of a planar object. It is also defined as the total sum of lengths of all the bounding sides of a planar object. Whereas, area is the measurement of space enclosed by a closed planar object. Thus, to find the cost incurred to paint a wall, we need to find the area and not the perimeter of the wall.

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To find the cost of painting a wall, we need to find the perimeter of the wall.

Question 19

State if the statement is true or false.

To find the cost of painting a wall we need to find the perimeter of the wall.

Q. To calculate the price for painting a wall, we need to find out its perimeter.

The floor of a rectangular hall has a perimeter 150 m. If cost of painting the four walls at the rate of Rs.10 per m² is Rs. 9000,find height of wall.

Q. The floor of a cuboidal hall has perimeter equal to 250 m and height 6 m. Find the cost of painting its four walls (including doors etc) at the rate of Rs.8 per square metre.

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