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A room with area of 15 × 12 m2 and its roof height above floor is 10 m. and room needs repairing of floor and need painting, repairing cost for floor is Rs.10/m2, and color cost on wall Rs.15/m2 when in room one gate of 2 × 1 m2, and a window of 1 × 1 m2, and designed painting on roof, cost of Rs.2000 individually, find total cost of repairing and painting in the room?, when buy paint and other necessary with paying Rs.5000.

A room with area of 15 × 12 m2 and its roof height above floor is 10 m. and room needs repairing of floor and need painting, repairing cost for floor is Rs.10/m2, and color cost on wall Rs.15/m2 when in room one gate of 2 × 1 m2, and a window of 1 × 1 m2, and designed painting on roof, cost of Rs.2000 individually, find total cost of repairing and painting in the room?, when buy paint and other necessary with paying Rs.5000. Correct Answer Rs.20855

Given: area of room = 15 × 12 m2

Height of roof = 10 m

Floor repair cost = Rs.10/m2

Color cost on wall = Rs.15/m2

Area of gate = 2 × 1 m2

Cost of color on gate = Rs.2000

Area of window = 1 × 1 m2

Cost of color on window = Rs.2000

Cost of paint on roof = Rs.2000

Paying for necessary thing of repair and paint = Rs.5000

Concept:

Area of wall = 2 × height × (length + breadth)

Calculation:

Floor area = 15 × 12 = 180 m2

Cost of repairing floor = 180 × 10

⇒ Rs.1800

Area of gate + window = 2 + 1

⇒ 3 m2

Area of wall for paint = 2 × height × (length + breadth) – 3

⇒ 2 × 10 × (15 +12) – 3

⇒ 537 m2

Cost of painting on wall = 537 × 15

⇒ Rs.8055

Total cost = 1800 + 2000 + 2000 +2000 + 8055 +5000

⇒ Rs.20855

∴ Total cost is 20855 rupees.

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