A door of length 2 m and breadth 1 m is fitted in a wall. The length of the wall is 4.5 m and the breadth is 3.6 m (see the given figure). Find the cost of white washing the wall, if the rate of white washing the wall is Rs 20 per m².

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Solution

Area of wall = 4.5 × 3.6 = 16.2 m²

Area of door = 2 × 1 = 2 m²

Area to be white-washed = 16.2 − 2 = 14.2 m²

Cost of white-washing 1 m² area = Rs 20

∴Cost of white-washing 14.2 m² area = 14.2 × 20 = Rs 284

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A door of length $2 m$ and breadth $1 m$ is fitted in a wall. The length of the wall is $4.5 m$ and the breadth is $3.6 m$ . Find the cost of the white washing the wall, if the rate white washing the wall is $R s . 20$ per $m^{2}$ .

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A door of length $2 m$ and breadth $1 m$ is fitted in a wall. The length of the wall is $4.5 m$ and the breadth is $3.6 m$ . Find the cost of white washing the wall is $R s . 20$ per $m^{2}$ .

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A door of length 2 m and breadth 1 m is fitted in a wall. The length of the wall is 4.5 m and the breadth is 3.6 m (see the given figure). Find the cost of white washing the wall, if the rate of white washing the wall is Rs 20 per m2.

Area of wall = 4.5 × 3.6 = 16.2 m2 Area of door = 2 × 1 = 2 m2 Area to be white-washed = 16.2 − 2 = 14.2 m2 Cost of white-washing 1 m2 area = Rs 20 ∴Cost of white-washing 14.2 m2 area = 14.2 × 20 = Rs 284

A door of length 2 m and breadth 1 m is fitted in a wall. The length of the wall is 4.5 m and the breadth is 3.6 m (see the given figure). Find the cost of white washing the wall, if the rate of white washing the wall is Rs 20 per m².

Area of wall = 4.5 × 3.6 = 16.2 m²

Area of door = 2 × 1 = 2 m²

Area to be white-washed = 16.2 − 2 = 14.2 m²

Cost of white-washing 1 m² area = Rs 20

∴Cost of white-washing 14.2 m² area = 14.2 × 20 = Rs 284