The circumference of a circle of diameter 7 cm is

1.	The circumference of a circle of diameter 7 cm is
Answer» Correct Question:- Find the CIRCUMFERENCE of a circle of diameter 7 cm is ____ Answer:- The circumference of a circle whose diameter 7cm is 22cm Step-by-step explanation: To Find:- The circumference ........(?) Solution:- Method 1 Given, diameter is 7cm We know that, $\boxed{ \sf{circumference \: of \: circle \: if \: diameter}} \\{ \boxed{\sf \: is \: given\: = \pi \: d}}$ Therefore, .....( π = 22/7 ) By putting the values, $= \dfrac{22}{7} \times 7$ Cancelling 7 = ( 22 × 1 ) cm Circumference = 22cm Method 2 Given, diameter is 7cm Radius = Diameter/2 radius ( r ) = 7/2 We know that, $\boxed{ \sf{Circumference= 2 \: \pi \: r}}$ By putting the values, $= 2 \times \dfrac{22}{7} \times \dfrac{7}{2}$ Cancelling 7 $= 2 \times 22 \times \dfrac{1}{2}$ Dividing 22 and 2 with 2 = 2 × 11 cm Circumference = 22cm Required Answer:- The circumference is 22cm.

Answer»

Correct Question:-

Find the CIRCUMFERENCE of a circle of diameter 7 cm is ____

Answer:-

The circumference of a circle whose diameter 7cm is 22cm

Step-by-step explanation:

To Find:-

Solution:-

Method 1

Given, diameter is 7cm

We know that,

$\boxed{ \sf{circumference \: of \: circle \: if \: diameter}} \\{ \boxed{\sf \: is \: given\: = \pi \: d}}$

Therefore, .....( π = 22/7 )

By putting the values,

$= \dfrac{22}{7} \times 7$

Cancelling 7

= ( 22 × 1 ) cm

Circumference = 22cm

Method 2

Given, diameter is 7cm

Radius = Diameter/2

radius ( r ) = 7/2

We know that,

$\boxed{ \sf{Circumference= 2 \: \pi \: r}}$

By putting the values,

$= 2 \times \dfrac{22}{7} \times \dfrac{7}{2}$

Cancelling 7

$= 2 \times 22 \times \dfrac{1}{2}$

Dividing 22 and 2 with 2

= 2 × 11 cm

Circumference = 22cm

Required Answer:-

The circumference is 22cm.

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