Question

A door of dimensions 7 m x 4 m is on the wall of dimension 18 m x 15 m. Find the cost of painting the wall if rate of painting is Rs 2.50 per sq. m.

Answer 1

Answer:

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Answer 2

Answer:

Cost of painting the wall = Rs 605

Step-by-step explanation:

Area of the wall = 18 × 15 = 270 m²

Area of the door = 7 × 4 = 28 m²

Now,

Area of the wall which should be painted = Area of total wall - Area of door

Area of the wall which should be painted = (270 - 28) m² = 242 m²

Cost of painting the wall per m² = Rs 2.50

∴ Cost of painting 242 m² = 242 × 2.50 = Rs 605

∴ Cost of painting the wall = Rs 605