Default Title

Question (11)

QN009598

The length of a quarter-circle arc of radius 28 cm is:

(A) 22 cm
(B) 44 cm
(C) 66 cm
(D) 88 cm

Correct Answer: B

Explanation:

Quarter arc = 1/4 × 2πr = 44 cm.

Link:

Report Error

Question (12)

QN009599

The arc length subtended by 90° at the centre of a circle of radius 14 cm is:

(A) 11 cm
(B) 22 cm
(C) 44 cm
(D) 88 cm

Correct Answer: B

Explanation:

Arc length = 90/360 × 2πr = 22 cm.

Link:

Report Error

Question (13)

QN009600

The arc length subtended by 120° at the centre of a circle of radius 21 cm is:

(A) 22 cm
(B) 44 cm
(C) 66 cm
(D) 88 cm

Correct Answer: B

Explanation:

Arc length = 120/360 × 2 × 22/7 × 21 = 44 cm.

Link:

Report Error

Question (14)

QN009601

A wheel has radius 35 cm. Distance covered in one revolution is:

(A) 110 cm
(B) 220 cm
(C) 440 cm
(D) 330 cm

Correct Answer: B

Explanation:

One revolution covers circumference = 220 cm.

Link:

Report Error

Question (15)

QN009602

A bicycle wheel of diameter 70 cm completes 100 revolutions. Distance travelled is:

(A) 110 m
(B) 220 m
(C) 330 m
(D) 440 m

Correct Answer: B

Explanation:

One revolution = 220 cm, so total = 22000 cm = 220 m.

Link:

Report Error

Question (16)

QN009603

The ratio of circumferences of two circles is 3:5. The ratio of their radii is:

(A) 9:25
(B) 3:5
(C) 5:3
(D) 6:25

Correct Answer: B

Explanation:

Circumference is directly proportional to radius.

Link:

Report Error

Question (17)

QN009604

If radius increases by 50%, circumference increases by:

(A) 25%
(B) 50%
(C) 75%
(D) 100%

Correct Answer: B

Explanation:

Circumference changes in the same ratio as radius.

Link:

Report Error

Question (18)

QN009605

The circumference of a circle is numerically equal to its area. The radius is:

(A) 1 unit
(B) 2 units
(C) π units
(D) 4 units

Correct Answer: B

Explanation:

2πr = πr² gives r = 2.

Link:

Report Error

Question (19)

QN009606

A circular garden has radius 7 m. A person walks around it 5 times. Total distance covered is:

(A) 110 m
(B) 220 m
(C) 440 m
(D) 550 m

Correct Answer: B

Explanation:

One round = 44 m, so 5 rounds = 220 m.

Link:

Report Error

Question (20)

QN009607

Which of the following best explains why runners in outer lanes start ahead in a race track?

(A) Outer lanes are narrower
(B) Outer lanes have smaller radius
(C) Outer lanes cover greater curved distance
(D) Inner lanes are slippery

Correct Answer: C

Explanation:

Outer lanes have larger curved paths.

Link:

Report Error

Question (11)

The length of a quarter-circle arc of radius 28 cm is:

Explanation:

Link:

Question (12)

The arc length subtended by 90° at the centre of a circle of radius 14 cm is:

Explanation:

Link:

Question (13)

The arc length subtended by 120° at the centre of a circle of radius 21 cm is:

Explanation:

Link:

Question (14)

A wheel has radius 35 cm. Distance covered in one revolution is:

Explanation:

Link:

Question (15)

A bicycle wheel of diameter 70 cm completes 100 revolutions. Distance travelled is:

Explanation:

Link:

Question (16)

The ratio of circumferences of two circles is 3:5. The ratio of their radii is:

Explanation:

Link:

Question (17)

If radius increases by 50%, circumference increases by:

Explanation:

Link:

Question (18)

The circumference of a circle is numerically equal to its area. The radius is:

Explanation:

Link:

Question (19)

A circular garden has radius 7 m. A person walks around it 5 times. Total distance covered is:

Explanation:

Link:

Question (20)

Which of the following best explains why runners in outer lanes start ahead in a race track?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY