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Question (21)

QN009878

If the area of a circle is fixed, increasing the radius is:

(A) Possible without change
(B) Impossible
(C) Always doubles area
(D) Always halves area

Correct Answer: B

Explanation:

Area changes whenever radius changes.

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Question (22)

QN009879

A circular garden has radius 35 m. Its area is:

(A) 1925 m²
(B) 3850 m²
(C) 1575 m²
(D) 7700 m²

Correct Answer: B

Explanation:

Area = 22/7 × 35 × 35 = 3850 m².

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Question (23)

QN009880

Which of the following can represent area?

(A) 44 cm
(B) 154 cm²
(C) 22 m
(D) 7 cm

Correct Answer: B

Explanation:

Area is represented in square units.

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Question (24)

QN009881

The area of a circle is 200.96 cm². Using π = 3.14, the radius is:

(A) 6 cm
(B) 7 cm
(C) 8 cm
(D) 9 cm

Correct Answer: C

Explanation:

r² = 200.96/3.14 = 64, so r = 8 cm.

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Question (25)

QN009882

A circle has radius 15 cm. Its area is:

(A) 225 cm²
(B) 450 cm²
(C) 706.5 cm²
(D) 1413 cm²

Correct Answer: C

Explanation:

Area = 3.14 × 15 × 15 = 706.5 cm².

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Question (26)

QN009883

If the radius of a circle becomes three times, the area becomes:

(A) Triple
(B) Six times
(C) Nine times
(D) Twenty-seven times

Correct Answer: C

Explanation:

Area becomes 3² = 9 times.

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Question (27)

QN009884

A circular carpet covers 615.44 m². Using π = 3.14, its radius is:

(A) 12 m
(B) 13 m
(C) 14 m
(D) 15 m

Correct Answer: C

Explanation:

r² = 615.44/3.14 = 196, so r = 14 m.

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Question (28)

QN009885

A square and a circle have equal areas of 196 cm². The area of the circle is:

(A) 98 cm²
(B) 196 cm²
(C) 392 cm²
(D) 784 cm²

Correct Answer: B

Explanation:

Equal areas mean the circle also has area 196 cm².

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Question (29)

QN009886

The area of a circle with diameter 20 cm is:

(A) 100 cm²
(B) 200 cm²
(C) 314 cm²
(D) 628 cm²

Correct Answer: C

Explanation:

Radius = 10 cm, area = 3.14 × 10 × 10 = 314 cm².

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Question (30)

QN009887

Which real-life object uses the concept of area of a circle?

(A) Measuring wire length
(B) Designing circular parks
(C) Counting corners
(D) Measuring wall height

Correct Answer: B

Explanation:

Circular parks involve calculation of circular area.

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Question (21)

If the area of a circle is fixed, increasing the radius is:

Explanation:

Link:

Question (22)

A circular garden has radius 35 m. Its area is:

Explanation:

Link:

Question (23)

Which of the following can represent area?

Explanation:

Link:

Question (24)

The area of a circle is 200.96 cm². Using π = 3.14, the radius is:

Explanation:

Link:

Question (25)

A circle has radius 15 cm. Its area is:

Explanation:

Link:

Question (26)

If the radius of a circle becomes three times, the area becomes:

Explanation:

Link:

Question (27)

A circular carpet covers 615.44 m². Using π = 3.14, its radius is:

Explanation:

Link:

Question (28)

A square and a circle have equal areas of 196 cm². The area of the circle is:

Explanation:

Link:

Question (29)

The area of a circle with diameter 20 cm is:

Explanation:

Link:

Question (30)

Which real-life object uses the concept of area of a circle?

Explanation:

Link:

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