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Question (11)

QN009868

The area of a circle depends on:

(A) Radius only
(B) Diameter only
(C) Circumference only
(D) Arc length only

Correct Answer: A

Explanation:

Area depends on radius.

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Question (12)

QN009869

The area of a circle with diameter 14 cm is:

(A) 44 cm²
(B) 154 cm²
(C) 308 cm²
(D) 616 cm²

Correct Answer: B

Explanation:

Radius = 7 cm, area = 154 cm².

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Question (13)

QN009870

Which statement is true about the area of a circle?

(A) It is measured in cubic units
(B) It measures the boundary
(C) It is measured in square units
(D) It depends only on diameter length

Correct Answer: C

Explanation:

Area is measured in square units.

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Question (14)

QN009871

A circle has area 616 cm². Using π = 22/7, its radius is:

(A) 7 cm
(B) 14 cm
(C) 21 cm
(D) 28 cm

Correct Answer: B

Explanation:

r² = (616 × 7)/22 = 196, so r = 14 cm.

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Question (15)

QN009872

If both the radius and diameter of a circle are doubled, the area becomes:

(A) Double
(B) Triple
(C) Four times
(D) Eight times

Correct Answer: C

Explanation:

Area becomes 2² = 4 times.

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Question (16)

QN009873

The area of a circle with radius x is:

(A) 2πx
(B) πx²
(C) πx
(D) x²

Correct Answer: B

Explanation:

Area = πx².

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Question (17)

QN009874

A circular plate has radius 21 cm. Its area is:

(A) 441 cm²
(B) 1386 cm²
(C) 2772 cm²
(D) 882 cm²

Correct Answer: B

Explanation:

Area = 22/7 × 21 × 21 = 1386 cm².

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Question (18)

QN009875

A circle has area 452.16 m². Using π = 3.14, find the radius.

(A) 10 m
(B) 11 m
(C) 12 m
(D) 13 m

Correct Answer: C

Explanation:

r² = 452.16/3.14 = 144, so r = 12 m.

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Question (19)

QN009876

Which mathematical constant appears in the formula for area of a circle?

(A) 2
(B) 10
(C) π
(D) 360

Correct Answer: C

Explanation:

π appears in the formula πr².

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Question (20)

QN009877

The area of a circle with radius 28 cm is:

(A) 1232 cm²
(B) 2464 cm²
(C) 616 cm²
(D) 784 cm²

Correct Answer: B

Explanation:

Area = 22/7 × 28 × 28 = 2464 cm².

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Question (11)

The area of a circle depends on:

Explanation:

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Question (12)

The area of a circle with diameter 14 cm is:

Explanation:

Link:

Question (13)

Which statement is true about the area of a circle?

Explanation:

Link:

Question (14)

A circle has area 616 cm². Using π = 22/7, its radius is:

Explanation:

Link:

Question (15)

If both the radius and diameter of a circle are doubled, the area becomes:

Explanation:

Link:

Question (16)

The area of a circle with radius x is:

Explanation:

Link:

Question (17)

A circular plate has radius 21 cm. Its area is:

Explanation:

Link:

Question (18)

A circle has area 452.16 m². Using π = 3.14, find the radius.

Explanation:

Link:

Question (19)

Which mathematical constant appears in the formula for area of a circle?

Explanation:

Link:

Question (20)

The area of a circle with radius 28 cm is:

Explanation:

Link:

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