Question

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

Answer 1

Answer:

Rs. 9000/-

Step-by-step explanation:

Given :-

Perimeter of floor = 250 m

Height = 6 m

Area of 4 walls = 250 × 6

= 1500 m²

 

Cost of painting 1 m² = Rs. 6

Cost of painting 1500 m² walls = 1500 × 6

= Rs. 9000/-

Hence, the cost of painting its four wall including door and window is Rs. 9000/- .

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Answer 2

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 x Height

Here, Perimeter of the floor = 250 m,

and height = 6 m

∴ Area of the four walls of the room

= (250 x6) m²

= 1500 m²

Cost of painting of 1 square metre Rs 6

∴ Cost of painting the four walls

= Rs (6 x 1500) = Rs 9000