Question

Find the cost of painting the four walls of a room of dimensions 5m×4m×6m at the rate of ₹10 per m^2.​

Answer 1

rate of painting=rs 10

cost of painting = 120*10=1200

Explanation:

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Answer 2

Answer:

740

Explanation:

Let the Length of room = 5 m

Breadth of room = 4 m

Height of room = 3 m

Area of 4 walls + area of ceiling = 2(l+b)h+ lb

Area of 4 walls + area of ceiling = 2(5 + 4) × 3 + (5 × 4)

Area of 4 walls + area of ceiling = 74 m ²

Cost of painting 1²m = Rs.10

Cost of painting 74²m = 74 × 10 = 740

Hence The cost of painting the four walls and ceiling of a room is Rs.740