Area MCQs

Question 1

The altitude of an equilateral triangle of side $$2\sqrt 3 $$ cm is :

Accepted Answer

3 cm

Answer

$$\frac{1}{2}$$ cm

Answer

$$\frac{{\sqrt 3 }}{4}$$ cm

Answer

$$\frac{{\sqrt 3 }}{2}$$ cm

Question 2

One of the diagonals of a rhombus is double the other diagonal. Its area is 25 sq. cm. The sum of the diagonal is ?

Accepted Answer

15 cm

Answer

10 cm

Answer

12 cm

Answer

16 cm

Question 3

Cost of fencing a circular plot at the rate of Rs. 15 per metre is Rs. 3300. What will be the cost of flooring the plot at the rate of Rs. 100 per square metre ?

Accepted Answer

Rs. 385000

Answer

Rs. 220000

Answer

Rs. 350000

Answer

Cannot be determined

Question 4

The ratio of the circumferences of two circles is 2 : 3. What is the ratio of their areas ?

Accepted Answer

4 : 9

Answer

2 : 3

Answer

9 : 4

Answer

None of these

Question 5

A circular road runs around a circular garden. If the difference between the circumference of the outer circle and the inner circle is 44 m, the width of the road is :

Accepted Answer

7 m

Answer

3.5 m

Answer

4 m

Answer

7.5 m

Question 6

The area of the greatest circle which can be inscribed in a square whose perimeter is 120 cm, is :

Accepted Answer

$$\frac{{22}}{7} 	imes {\left( {15} ight)^2}c{m^2}$$

Answer

$$\frac{{22}}{7} 	imes {\left( {\frac{7}{2}} ight)^2}c{m^2}$$

Answer

$$\frac{{22}}{7} 	imes {\left( {\frac{9}{2}} ight)^2}c{m^2}$$

Answer

$$\frac{{22}}{7} 	imes {\left( {\frac{15}{2}} ight)^2}c{m^2}$$

Question 7

The area of the largest triangle that can be inscribed in a semi-circle of radius r, is :

Accepted Answer

r2

Answer

2r2

Answer

r3

Answer

2r3

Question 8

If radius of a circle is 3 cm, what is the area of the circle in sq. cm ?

Accepted Answer

$$9\pi $$ sq. cm

Answer

$$6\pi $$ sq. cm

Answer

$$\frac{{3\pi }}{2}$$ sq. cm

Answer

$$9{\pi ^2}$$ sq. cm

Question 9

The base of an isosceles is 14 cm and its perimeter is 36 cm. Find its area.

Accepted Answer

42$$\sqrt 2 $$ sq. cm

Answer

42 sq. cm

Answer

84 sq. cm

Answer

48 sq. cm