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If the circumference of a sheet is $${154}{m},$$ find its radius. Also find the area of the sheet. (take $${p}=\frac{{22}}{{7}}$$)
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## QuestionMathsClass 7

If the circumference of a sheet is $${154}{m},$$ find its radius. Also find the area of the sheet. (take $${p}=\frac{{22}}{{7}}$$)

$${c}={2}\pi{r}$$

$${154}={2}\times\frac{{22}}{{7}}\times{r}$$

$${r}=\frac{{{154}\cdot{7}}}{{{22}\cdot{2}}}={24.5}$$

$${A}=\pi{r}^{{2}}=\frac{{22}}{{7}}\cdot\frac{{49}}{{2}}\cdot\frac{{49}}{{2}}$$

$$={1886.5}{m}^{{2}}$$