# CBSE Class 10-Mathematics: Chapter – 12 Areas Related to Circles Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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## 1 Mark Questions

Unless stated otherwise, take

**Question 1**:

The radii of two circles are and respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles.

**Answer**:

Let R be the radius of the circle which has circumference equal to the sum of circumferences of the two circles, then according to question,

**Question 2**:

The circumference of a circular field is 528 cm. Then its radius is

(a)

(b)

(c)

(d)

**Answer**:

(b) 84 cm

**Question 3**:

The circumference of a circle exceeds its diameter by 180 cm. Then its radius is

(a)

(b)

(c)

(d)

**Answer**:

(d)

**Question 4**:

Area of the sector of angle of a circle with radius is

(a)

(b)

(c)

(d) None of there

**Answer**:

(b)

**Question 5**:

Area of a sector of angle P of a circle with radius R is

(a)

(b)

(c)

(d)

**Answer**:

(d)

**Question 6**:

If the sum of the circumferences of two circles with radii and is equal to the circumference of a circle of Radius , then

(a)

(b)

(c)

(d) None of these

**Answer**:

(a)

**Question 7**:

If the perimeter of a circle is equal to that of a square, then the ratio of their area is

(a)

(b)

(c)

(d)

**Answer**:

(c)

**Question 8**:

Area of a sector of angle of a circle with radius R is

(a)

(b)

(c)

(d)

**Answer**:

(d)