Question

A window of dimensions 3m by 2m is on the wall of dimension 10m x 10m.
Find the cost of painting the wall if the rate of painting is ₹ 2.50 per square
metre.

Answer 1

Answer:

₹235

Step-by-step explanation:

Cost = rate × area to be painted

Area to be painted = total area - area of window

 Here,

Total area = 10m x 10m = 100 m²

Area of window = 3m x 2m = 6 m²

 ∴ Cost = ₹ 2.5 × (100 - 6)

             = ₹ 235

Answer 2

Given :-

Window measure  3m by 2m is

Wall = 10m x 10m.

To Find :-

Total cost

Solution :-

We know that

A(window) = lb

A = 3  x 2

A = 6 m

Then,

Area(Wall) = side  x side

Area = 10  x 10

Area = 100 m

Cost = Rs. 2.5 × (100 - 6)

Cost = Rs. 2.5  ×  94

Cost = ₹ 235