Find the circumference of the circles with the following radius: (Take π =22/7)
(a) 14 cm   (b) 28 mm   (c) 21 cm

Solution:

(a) Circumference of the circle = 2πr

= 2 × 22/7 × 14 cm

= 2 × 22 × 2 cm

= 88 cm

(b) Circumference of the circle = 2πr

= 2 × 22/7 × 28 mm

= 2 × 22 × 4 mm

= 176 mm

(c) Circumference of the circle = 2πr

= 2 × 22/7 × 21 cm

= 2 × 22 × 3 cm

= 132 cm

☛ Check: NCERT Solutions for Class 7 Maths Chapter 11

Video Solution:

Find the circumference of the circles with the following radius: (Take π = 22/7)
(a) 14 cm (b) 28 mm (c) 21 cm

Class 7 Maths NCERT Solutions Chapter 11 Exercise 11.3 Question 1

Summary:

The circumference of the circles with the following radius is (a) The radius is 14 cm and circumference is 88 cm (b) The radius is 28 mm and circumference is 176 mm (c) The radius is 21 cm and circumference is 132 cm

☛ Related Questions:

• Find The Area Of The Following Circles Given That A Radius 14 Mm Take 22 7 B Diameter 49 M C Radius 5 Cm
• If The Circumference Of A Circular Sheet Is 154 M Find Its Radius Also Find The Area Of The Sheet Take 22 7
• A Gardener Wants To Fence A Circular Garden Of Diameter 21 M Find The Length Of The Rope He Needs To Purchase If He Makes 2 Rounds Offense Also Find The Cost Of The Rope
• From A Circular Sheet Of Radius 4 Cm A Circle Of Radius 3 Cm Is Removed Find The Area Of The Remaining Sheet Take 314