Measurement of Area

Q. The amount of surface covered by an object is called.

1. volume
2. area
3. mass

Q.

The amount of surface enclosed by a closed figure is called its perimeter.

1. True
2. False

Q.

The radius of a sphere is measured to be $20cm$ with a possible error of $0.02$ of a$cm$. The consequent error in the surface of the sphere is

1. $10.5sq.cm$

2. $5.025sq.cm$

3. $10.05sq.cm$

4. None of these

Q.

A ganza is a percussion instrument used in samba music.

(a) Find the surface area of each of the two labeled ganzas.

(b) The smaller ganza weighs 1.1 pounds. Assume that the surface area is proportional to the weight. What is the weight of the larger ganza?

Q.

Graph paper can be used to calculate volume of an irregular shape

1. True
2. False

Q. Sphere has a radius of 7 cm. If the radius is increased to 14 cm, calculate the change in the surface area of the sphere.

1. $588\pi c{m}^2$
2. $688\pi c{m}^2$
3. $788\pi c{m}^2$
4. $888\pi c{m}^2$

Q.

The extent of surface enclosed by a closed figure is called its area

1. Perimeter

2. Area

Q.

wht is the area of a cirle?

Q.

_____ is used to calculate volume of an irregular object.

Q.

The amount of surface occupied by an object is:

1. breadth

2. length

3. volume

4. area

Q.

Surface area of a circle is .

1. ${\mathrm{\pi r}}^2$
2. ${\mathrm{\pi r}}^3$
3. $2{\mathrm{\pi r}}^2$

Q. Length of the dining hall is 15 m and breadth is 12 m. Square tiles are to be fixed of length 30 cm in the floor of the hall, then how many tiles are needed?

Q.

if the area of a circle is 16pie r² unit², write the radius of the circle.

Q. Area of a square of side $5cm$ is:

1. $2.5c{m}^2$
2. $0.25m{m}^2$
3. $25c{m}^2$
4. $2500m{m}^2$

Q. Which of the following unit is used for the area of a surface?

1. $km{h}^{-1}$
2. $m^3$
3. $\text{Litre}$
4. $m^2$

Q.

On Diwali, Ted’s mom made a colorful rangoli as shown in the figure. The bigger square measured 30 cm by 30 cm and the smaller square measured 15 cm by 15 cm. What was the area of the orange colored part?

1. 375 cm²

2. 1125 cm²

3. 825 cm²

4. 675 cm²

Q. The breadth of a rectangle is $w$ cm and the length is $5$ times as long as its breadth. What is the perimeter of the rectangle

1. $5w^2$ cm
2. $12w$ cm
3. $(10+2w)$ cm
4. $(25+w^2)$ cm

Q. Find the area of triangle whose base is 4 cm long and the height corresponding to the base measures 12 cm.

1. $24c{m}^2$
2. $12c{m}^2$
3. $18c{m}^2$
4. $48c{m}^2$

Q.

The area of a circle is $\pi a^2$, then the radius of the circle is ____.

1. 2d

2. d/2

3. d²

4. d

Q. The area of a square whose each side is equal to $1km$ is $1k{m}^2$.

1. True
2. False

Q.

The formula to find the area of a circle with radius r.

1. ${\mathrm{\pi r}}^2$

2. $2\mathrm{\pi r}$

3. $2{\mathrm{\pi r}}^2$

4. $\mathrm{\pi r}$

Q.

Which of the following is NOT the correct measurement of S.I. unit?

1. $2kg$ of cooking oil.

2. $5m$ of cloth.

3. $20seconds$ of time.

4. Surface area of $25c{m}^2$.

Q.

What is a measuring cylinder?

Q.

IF THE RADIUS OF A CIRCLE IS 7/ SQUARE ROOT OF PI CM, THEN WHAT IS THE AREA OF THE CIRCLE?

Q.

Statement 1: Area of a rectangle with length ‘l’ and breadth ‘b’ is equal to $‘l\times b^{\prime }$.

Statement 2: All squares are rectangles with $l=b$

Pick the correct option from the following

1. Statement 1 is true but Statement 2 is false

2. Both the statements are true but not sufficient to figure out area of a square

3. Statement 1 is false but Statement 2 is true

4. Both the statements are true and sufficient to figure out area of a square

Q. The difference between the circumference and radius of a circle is 37 cm. The area of the circle is

(a) 111 cm²
(b) 148 cm²
(c) 154 cm²
(d) 259 cm²

Q. The area of a circle is 154 cm². Find the radius of the circle.

Q.

The surface occupied by an object is known as its ________ .

Q.

To calculate the volume of an irregular object we need to:

1. add initial volume and final volume

2. subtract final volume from initial volume

3. subtract the initial volume from the final volume

4. none of these