The circumference of a circle is 31.4 cm. Find the radius and the area of the circle. (Take π = 3.14)

Solution:

Circumference of the circle = 31.4 cm

2πr = 31.4 cm

2 × 3.14 × r = 31.4 cm

r = 31.4 cm /6.28

r = 5 cm

Area of the circle = πr²

= 3.14 × 5 cm × 5 cm

= 78.5 cm²

Therefore, the radius and the area of the circle are 5 cm and 78.5 cm² respectively.

☛ Check: NCERT Solutions for Class 7 Maths Chapter 11

Video Solution:

The circumference of a circle is 31.4 cm. Find the radius and the area of the circle

Maths NCERT Solutions Class 7 Chapter 11 Exercise 11.3 Question 12

Summary:

The circumference of a circle is 31.4 cm. The radius and the area of the circle is 5 cm and 78.5 cm² respectively.

☛ Related Questions:

• A Circular Flower Bed Is Surrounded By A Path 4 M Wide The Diameter Of The Flower Bed Is 66 M What Is The Area Of This Path 3 14
• A Circular Flower Garden Has An Area Of 314 M2 A Sprinkler At The Center Of The Garden Can Cover An Area That Has A Radius Of 12 M Will The Sprinkler Can Water The Entire Garden
• Find The Circumference Of The Inner And The Outer Circles Shown In The Adjoining Figure Take 3 14
• How Many Times A Wheel Of Radius 28 Cm Must Rotate To Go 352 M Take 22 7