A wall of a room is of dimensions 5 m × 4 m. It has a window of dimensions 1.5 m × 1m and a door of dimensions 2.25 m × 1m. Find the area of the wall which is to be painted.

Solution:

Given, the dimensions of a wall of a room is 5 m × 4 m.

The dimensions of a window is 1.5 m × 1m

The dimensions of a door is 2.25 m × 1m

We have to find the area of the wall to be painted.

Area of rectangle = length × breadth

Area of entire wall of a room = 5(4)

= 20 m²

Area of window = 1.5(1)

=1.5 m²

Area of door = 2.25(1)

= 2.25 m²

Area of wall to be painted = area of entire wall - area of window - area of door

= 20 - (1.5 + 2.25)

= 20 - 3.75

= 16.25 m²

Therefore, the area of wall to be painted is 16.25 m²

✦ Try This: A wall of a room is of dimensions 6 m × 3 m. It has a window of dimensions 2 m × 1m and a door of dimensions 3 m × 1 m. Find the area of the wall which is to be painted.

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11

NCERT Exemplar Class 7 Maths Chapter 9 Problem 76

A wall of a room is of dimensions 5 m × 4 m. It has a window of dimensions 1.5 m × 1m and a door of dimensions 2.25 m × 1m. Find the area of the wall which is to be painted.

Summary:

A wall of a room is of dimensions 5 m × 4 m. It has a window of dimensions 1.5 m × 1m and a door of dimensions 2.25 m × 1m. The area of the wall which is to be painted is 16.25 m²

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