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Question (31)

QN009888

A circular plot has area 154 m². Using π = 22/7, its radius is:

(A) 5 m
(B) 6 m
(C) 7 m
(D) 8 m

Correct Answer: C

Explanation:

r² = (154 × 7)/22 = 49, so r = 7 m.

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Question (32)

QN009889

A circle with radius 11 cm has area:

(A) 121 cm²
(B) 242 cm²
(C) 380.06 cm²
(D) 484 cm²

Correct Answer: C

Explanation:

Area = 3.14 × 11 × 11 = 380.06 cm².

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Question (33)

QN009890

If the radius of a circle is tripled, the area changes by a factor of:

(A) 3
(B) 6
(C) 9
(D) 27

Correct Answer: C

Explanation:

Area depends on square of radius.

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Question (34)

QN009891

The area of a circular banner with radius 9 m is:

(A) 81 m²
(B) 162 m²
(C) 254.34 m²
(D) 508.68 m²

Correct Answer: C

Explanation:

Area = 3.14 × 9 × 9 = 254.34 m².

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Question (35)

QN009892

A circle divided into 100 equal unit squares approximately has area:

(A) 50 square units
(B) 75 square units
(C) 100 square units
(D) 200 square units

Correct Answer: C

Explanation:

Area equals the number of unit squares covering the figure.

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Question (36)

QN009893

The area of a circle with radius 12 cm is:

(A) 144 cm²
(B) 288 cm²
(C) 452.16 cm²
(D) 904.32 cm²

Correct Answer: C

Explanation:

Area = 3.14 × 12 × 12 = 452.16 cm².

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Question (37)

QN009894

A circular sheet has area 113.04 cm². Using π = 3.14, its radius is:

(A) 4 cm
(B) 5 cm
(C) 6 cm
(D) 7 cm

Correct Answer: C

Explanation:

r² = 113.04/3.14 = 36, so r = 6 cm.

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Question (38)

QN009895

Which mathematical operation is mainly used to find the area of a circle?

(A) Addition
(B) Subtraction
(C) Multiplication involving square of radius
(D) Division only

Correct Answer: C

Explanation:

Area = π × radius².

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Question (39)

QN009896

The product of π and the square of radius gives the:

(A) Circumference
(B) Diameter
(C) Area
(D) Arc length

Correct Answer: C

Explanation:

πr² gives the area of a circle.

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Question (40)

QN009897

A circular table top has radius 18 cm. Its area is:

(A) 324 cm²
(B) 648 cm²
(C) 1017.36 cm²
(D) 2034.72 cm²

Correct Answer: C

Explanation:

Area = 3.14 × 18 × 18 = 1017.36 cm².

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Question (31)

A circular plot has area 154 m². Using π = 22/7, its radius is:

Explanation:

Link:

Question (32)

A circle with radius 11 cm has area:

Explanation:

Link:

Question (33)

If the radius of a circle is tripled, the area changes by a factor of:

Explanation:

Link:

Question (34)

The area of a circular banner with radius 9 m is:

Explanation:

Link:

Question (35)

A circle divided into 100 equal unit squares approximately has area:

Explanation:

Link:

Question (36)

The area of a circle with radius 12 cm is:

Explanation:

Link:

Question (37)

A circular sheet has area 113.04 cm². Using π = 3.14, its radius is:

Explanation:

Link:

Question (38)

Which mathematical operation is mainly used to find the area of a circle?

Explanation:

Link:

Question (39)

The product of π and the square of radius gives the:

Explanation:

Link:

Question (40)

A circular table top has radius 18 cm. Its area is:

Explanation:

Link:

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