# CBSE Class 10-Mathematics: Chapter –12 Areas Related to Circles Part 2

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**Question 9:**

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

(a)

(b)

(c)

(d)

**Answer:**

(a)

**Question 10:**

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 11:**

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

(a)

(b)

(c)

(d)

**Answer:**

(d)

**Question 12:**

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

(a)

(b)

(c)

(d) None of these

**Answer:**

(b)

**Question 13:**

The area of a circle is . Then the radius of the circle is

(a)

(b)

(c)

(d)

**Answer:**

(c)

**Question 14:**

If the sum of the areas of two circles with radii and is equal to the area of a circle of radius R, then

(a)

(b)

(c)

(d)

**Answer:**

(a)

**Question 15:**

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

(a)

(b)

(c)

(d)

**Answer:**

(c)

**Question 16:**

If the perimeter and area of circle are numerically equal, then the radius of the circle is

(a)

(b)

(c)

(d)

**Answer:**

(a)