Circumference of a circle of diameter 5 cm is
(a) 3.14 cm
(b) 31.4 cm
(c) 15.7 cm
(d) 1.57 cm

Solution:

Given, diameter of circle = 5 cm

We have to find the circumference of a circle

Radius, r = 5/2 cm

Circumference of circle = 2πr

Where, r is the radius of circle

= 2 × 22/7 × 5/2

= 22(5)/7

= 110/7

= 15.7 cm

Therefore, the circumference of the circle is 15.7 cm

✦ Try This: Circumference of a circle of diameter 7 cm is

Given, diameter of circle = 5 cm

We have to find the circumference of a circle

Radius, r = 7/2 cm

Circumference of circle = 2πr

Where, r is the radius of circle

= 2 × 22/7 × 7/2

= 22(7)/7

= 22 cm

Therefore, the circumference of circle is 22 cm

☛ Also Check: NCERT Solutions for Class 7 Maths Chapter 11

---

NCERT Exemplar Class 7 Maths Chapter 9 Problem 19

Circumference of a circle of diameter 5 cm is (a) 3.14 cm, (b) 31.4 cm, (c) 15.7 cm, (d) 1.57 cm

Summary:

Circumference of a circle of diameter 5 cm is 15.7 cm

---

☛ Related Questions:

• Circumference of a circle disc is 88 cm. Its radius is (a) 8 cm, (b) 11 cm, (c) 14 cm, (d) 44 cm
• Length of tape required to cover the edges of a semicircular disc of radius 10 cm is (a) 62.8 cm, (b . . . .
• Area of circular garden with diameter 8 m is (a) 12.56 m², (b) 25.12 m², (c) 50.24 m², (d) 200.96 m²