The floor of a rectangular hall has a perimeter of 250 m . its height is 6m . Find the cost of painting its four walls (including doors , etc. ) at the rate of Rs 6 per square metre.

Answers (1)

Solution :  We know that the area A of the four walls of a room is given by 

                  A = perimeter of the floor of the room 	imes Height 

                 Here , perimeter of the floor = 250m , and height =6m 

	herefore             Area of the four walls of the room =(250	imes6)m^2=1500m^2

We have ,

               cost of painting of 1 square metre =Rs 6

	herefore            cost of painting the four walls =Rs(6	imes 1500)=Rs9000

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