Advertisements
Advertisements
प्रश्न
A wall of a room is of dimensions 5 m × 4 m. It has a window of dimensions 1.5 m × 1 m and a door of dimensions 2.25 m × 1 m. Find the area of the wall which is to be painted.
उत्तर
Given, a wall of a room is of dimensions 5 m × m.
∴ Length of the room = 5 m and breadth of the room = 4 m
∴ Area of the room = l × b = 5 × 4 = 20 m2
Also, length of the window = 1.5 m and breadth of the window = 1 m ......[Given]
∴ Area of the window = l × b = 1.5 × 1 = 1.5 m2
Now, length of the door = 2.25 m and breadth of the door = 1 m
∴ Area of the door = l × b = 2.25 × 1 = 2.25 m2
Now, area of the wall to be painted = Area of the room – (Area of the window + Area of the door)
= 20 – (1.5 + 2.25)
= 20 – 3.75
= 16.25 m2
APPEARS IN
संबंधित प्रश्न
As shown in the figure, four napkins, all of the same size, were made from a square piece of cloth of length 1 m. What length of lace will be required to trim all four sides of all the napkins?
What is the value of a rectangular plot of land 75.5 m long and 30.5 m broad at the rate of 1000 rupees per square metre?
If the cost of 1 sq m of a plot of land is 900 rupees, find the total cost of a plot of land that is 25 m long and 20 m broad.
Find the area of the following rectangle
length = 6 cm and breadth = 3 cm
Here is a rectangle of an area of 20 square cm.
Draw one straight line in this rectangle to divide it into two equal rectangles. What is the area of each of the smaller rectangles?
If length of a rectangle is halved and breadth is doubled then the area of the rectangle obtained remains same.
Find the area of the rectangle whose sides are:
2 km and 3 km
Use the following figure, showing the layout of a farm house:
- What is the area of land used to grow hay?
- It costs ₹ 91 per m2 to fertilise the vegetable garden. What is the total cost?
- A fence is to be enclosed around the house. The dimensions of the house are 18.7 m × 12.6 m. At least how many metres of fencing are needed?
- Each banana tree required 1.25 m2 of ground space. How many banana trees can there be in the orchard?
The plan and measurement for a house are given in the figure. The house is surrounded by a path 1 m wide.
Find the following:
- Cost of paving the path with bricks at rate of ₹ 120 per m2.
- Cost of wooden flooring inside the house except the bathroom at the cost of ₹ 1200 per m2.
- Area of Living Room.
4 squares each of side 10 cm have been cut from each corner of a rectangular sheet of paper of size 100 cm × 80 cm. From the remaining piece of paper, an isosceles right triangle is removed whose equal sides are each of 10 cm length. Find the area of the remaining part of the paper.
