Question

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

Answer 1

Given perimeter of floor = 250m

We know that, perimeter = 2(l + b)

=> 2(l + b) = 250 m

Now given that height = 6m

Here, we have to find lateral surface area as the walls are to be painted.

Lateral surface area = 2(l + b) × h

=> 250 × 6

= 1500 m²

Since doors are also be painted, no area is excluded. Hence cost of painting = 6 × 1500 = ₹9,000

Hope it helps

Answer 2

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Perimeter of floor = 250m

Perimeter = 2(l + b)

=> 2(l + b) = 250 m

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Height = 6m

Lateral surface area as the walls are to be painted.

Lateral surface area = 2(l + b) × h

=> 250 × 6

= 1500 m²

:- Doors are also be painted :-

:- Area is not excluded :-

:- Hence cost of painting :-

= 6 × 1500

= ₹9,000

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