1.

If the circumference of a circle is 82π , then the value of ‘r’ is

Answer»

Hence, CIRCUMFERENCE of CIRCLE = 2πr. So the value of ‘r’ if circumference of a circle is 82π is,

= > 82 \: \pi = 2 \: \pi \: r \\ \\ = > 82 = \frac{2 \: \pi \: r}{\pi} \\ \\ = > 82 = \frac{2 \: \cancel{\pi} \: r}{ \cancel{\pi}} \\ \\ = > 82 = 2r \\ \\ = > r = \frac{ {\cancel{(82}})^{<klux>41</klux>} }{ \cancel{(2})^{1} } = 41 \\ \\ = > \green{ \boxed{r = 41}}

∴ The value of ‘r’ is 41.


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