Question

find circumference of a circle of diameter 10 cm
Take t= 31.4
find area also​

Answer 1

Explanation :-

Given :-

• Diameter of circle (d) = 10cm
• π = 3.14

To Find :-

• The circumference of circle.
• The area of circle.

Solution :-

Diameter = 10cm

=> Radius = Diameter /2

=> Radius = 10/2

=> Radius(r) = 5cm

As we know that,

The circumference of circle = 2πr

=> Circumference of circle = 2 × 3. 14 × 5

=> Circumference of circle = 6.28 × 5

=> Circumference of circle = 31.4cm.

Now,

Area of circle = πr²

=> Area of circle = 3.14 × (5)²

=> Area of circle = 3.14 × 25

=> Area of circle = 78.5cm² .

Answer 2

★ QUESTION :

Find the circumference of a circle of diameter 10 cm with taking here 't' = 31.4 . Find the area also.

GIVEN :

➠ Diameter = 10 cm

Here, we are already given the value of π as 3.14

➠ π (value of π) = 3.14

TO FIND :

➠ The area of the circle = ?

➠ The circumference of the circle = ?

STEP- BY- STEP EXPLAINATION :

Here, we are given the diameter of the circle = 10 cm

→ Radius of the circle = D / 2

(substituting the values as per the given formula)

→ Radius of the circle = 10 / 2 = 5 cm

Therefore, now we have to find the circumference and area of the circle.

⟹ For finding circumference of the circle :

Formula of circumference:

→ 2πr

(substituting the values)

→ circumference = 2 × 3.14 × 5

→ circumference = 6.28 × 5

→ circumference = 31.4 cm

Hence, the circumference of the circle = 31.4 cm

⟹ For finding area of the circle :

Formula for finding area :

→ πr²

(substituting the values)

→ Area = 3. 14 × (5)²

→ Area = 3.14 × 25

→ Area = 78.5 cm²

Hence, area of the circle is 78.5 cm²