Question

the diameter of a circle is 20cm find its circumference and it's area

Answer 1

Answer:

Step-by-step explanation:

Given :-

Diameter of circle (d) = 20 cm

To Find :-

Circumference and Area of Circle

Formula to be used :-

Area of a circle = πr²

Solution :-

Circumference = 20 × 3.14 = 62.8 cm

Radius (r) = d/2 = 10 cm

Area of a circle = πr²

Area of a circle = 3.14 × 10 × 10 = 314 cm²

Hence, Circumference and Area of Circle are 62.8 cm  and 314 cm².

Answer 2

Answer:

Circumference of the circle = 62.8cm

Area of the circle =  314cm²

Step-by-step explanation:

Given,

Diameter of the circle = 20cm

To find,

The circumference of the circle

The area of the circle

Recall the formulas

Diameter = 2r

Circumference of the circle = 2πr

Area of the circle = πr², where 'r' is the radius of the circle.

The value of π = 3.14

Solution:

Since diameter =  20cm, then radius = r = 10cm

Circumference of the circle = 2πr = 2 ×  3.14 × 10 = 62.8cm

Area of the circle =  πr² = 3.14 × 10² = 3.14 × 100 = 314cm²

∴ Circumference of the circle = 62.8cm

Area of the circle =  314cm²

#SPJ2