Question

please answer this question

Answer 1

$\huge{\red{\bold{Solution : \longrightarrow}}}$

$\mathsf{1) \: \: Given,}$

$\mathsf{\tiny{\blue{diameter \: \: of \: \: the \: \: circle = 63 \: \: cm}}}$

$\mathsf{\tiny{\blue{ = > radius \: \: of \: \: the \: \: circle = ( \frac{63}{7} ) \: cm}}}$

$\mathsf{\green{Circumference \: \: of \: \: the \: \: circle}}$

$\mathsf{= 2\pi {r}^{} }\\ \\ \mathfrak{= (2 \times \frac{22}{7} \times \frac{63}{2} ) \: cm} \\ \\ \mathfrak{= 198 \: cm}$

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$\mathsf{2) \: \: Given,}$

$\mathsf{\tiny{\green{diameter \: \: of \: \: the \: \: circle = 35 \: cm}}}$

$\mathsf{\tiny{\green{= > radius \: \: of \: \: the \: \: circle = (\frac{35}{2}) \: cm}}}$

$\mathsf{\blue{Circumference \: \: of \: \: the \: \: circle}}$

$\mathsf{ = 2\pi {r}^{} }\\ \\ \mathfrak{= (2 \times \frac{22}{7} \times \frac{35}{2} ) \: cm} \\ \\ \mathfrak{= 110 \: cm}$

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$\mathsf{3) \: \: Given,}$

$\mathsf{\tiny{\pink{diameter \: \: of \: \: the \: \: circle = 21 \: cm}}}$

$\mathsf{\tiny{\pink{ = > radius \: \: of \: \: the \: \: circle = ( \frac{21}{2} ) \: cm}}}$

$\mathsf{\purple{Circumference \: \: of \: \: the \: \: circle}}$

$\mathsf{ = 2\pi {r}^{} }\\ \\ \mathfrak{= (2 \times \frac{22}{7} \times \frac{21}{2} ) \: cm} \\ \\ \mathfrak{= 66 \: cm}$

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