Question

Find the circumference and area of a circle of radius 20 cm. (use π
= 3.14)


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Answer 1

$\mathfrak{ \large{\blue{ \underline{ \purple{ Given: }}}}}$

• Radius of circle = 20 cm
• Value of π = 3.14

$\mathfrak{ \large{\blue{ \underline{ \purple{ To \: Find: }}}}}$

• Area and perimeter of circle

$\mathfrak{ \large{\blue{ \underline{ \purple{ Solution:}}}}}$

$\:\:\:\:\:\:\:\:\:\:\:\:\: \mathfrak{ \underline{ \green{Formula \: to \: calculate \: the \: circumference \: of \: circle}}}$

$\boxed{ \mathfrak{ \star \: \: \: { \red{ \large{circumference = 2 \times \pi \times radius}}}}}$

According to question,

$\large{ \rm \longmapsto \: \: \: \: \: \: \: circumference = 2 \times 3.14 \times 20}$

$\large{ \rm \longmapsto \: \: \: \: \: \: \: circumference = \boxed{ \orange{ \mathfrak 125.6 \: cm}}}$

$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\: \mathfrak{ \underline{ \green{Formula \: to \: calculate \: the \: circumference \: of \: circle}}}$

$\boxed{ \mathfrak{ \star \: \: \: \: \: \: { \red{ \large{area = \pi \times {radius}^{2} }}}}}$

According to question,

$\large{ \rm \longmapsto \: \: \: \: \: \: \: area = 3.14 \times {20}^{2}}$

$\large{ \rm \longmapsto \: \: \: \: \: \: \: area = 3.14 \times 20 \times 20}$

$\large{ \rm \longmapsto \: \: \: \: \: \: \: area = \boxed{ \orange{ \mathfrak{1256 \: {cm}^{2} }}}}$

$\mathfrak{ \large{\blue{ \underline{ \purple{ Hence:}}}}}$

The area and circumference of circle is 125.6 cm and 1256 cm²

Answer 2

$\mathfrak{ \large{\blue{ \underline{ \purple{ Given: }}}}}Given:</p><p></p><p>Radius of circle = 20 cm</p><p></p><p>Value of π = 3.14</p><p></p><p>\mathfrak{ \large{\blue{ \underline{ \purple{ To \: Find: }}}}}ToFind:</p><p></p><p>Area and perimeter of circle</p><p></p><p>\mathfrak{ \large{\blue{ \underline{ \purple{ Solution:}}}}}Solution:</p><p>\:\:\:\:\:\:\:\:\:\:\:\:\: \mathfrak{ \underline{ \green{Formula \: to \: calculate \: the \: circumference \: of \: circle}}}Formulatocalculatethecircumferenceofcircle</p><p>\boxed{ \mathfrak{ \star \: \: \: { \red{ \large{circumference = 2 \times \pi \times radius}}}}}⋆circumference=2×π×radius</p><p></p><p>According to question,</p><p></p><p>\large{ \rm \longmapsto \: \: \: \: \: \: \: circumference = 2 \times 3.14 \times 20}⟼circumference=2×3.14×20</p><p>\large{ \rm \longmapsto \: \: \: \: \: \: \: circumference = \boxed{ \orange{ \mathfrak 125.6 \: cm}}}⟼circumference=125.6cm</p><p>\:\:\:\:\:\:\:\:\:\:\:\:\:\:\: \mathfrak{ \underline{ \green{Formula \: to \: calculate \: the \: circumference \: of \: circle}}}Formulatocalculatethecircumferenceofcircle</p><p>\boxed{ \mathfrak{ \star \: \: \: \: \: \: { \red{ \large{area = \pi \times {radius}^{2} }}}}}⋆area=π×radius2</p><p></p><p>According to question,</p><p></p><p>\large{ \rm \longmapsto \: \: \: \: \: \: \: area = 3.14 \times {20}^{2}}⟼area=3.14×202</p><p>\large{ \rm \longmapsto \: \: \: \: \: \: \: area = 3.14 \times 20 \times 20}⟼area=3.14×20×20</p><p>\large{ \rm \longmapsto \: \: \: \: \: \: \: area = \boxed{ \orange{ \mathfrak{1256 \: {cm}^{2} }}}}⟼area=1256cm2</p><p>\mathfrak{ \large{\blue{ \underline{ \purple{ Hence:}}}}}Hence:</p><p>The area and circumference of circle is 125.6 cm and 1256 cm²</p><p>$