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| 1. |
The area of circle is 301.84 cm2 find its circumference |
| Answer» We have,Area of circle = 301.84 cm2{tex}\\Rightarrow \\pi {r^2} = 301.84{/tex}{tex}\\Rightarrow \\frac{{22}}{7} \\times {r^2} = 301.84{/tex}{tex} \\Rightarrow {r^2} = \\frac{{301.84 \\times 7}}{{22}}{/tex}{tex} \\Rightarrow {r^2} = \\frac{{301.84 \\times 7}}{{22}}{/tex}{tex}\\Rightarrow {r^2} = \\frac{{1372 \\times 7}}{{100}}{/tex}{tex} \\Rightarrow r = \\sqrt {\\frac{{9604}}{{100}}} = \\frac{{98}}{{10}} = 9.8cm{/tex}{tex}\\therefore {/tex}\xa0circumference of circle =\xa0{tex} 2\\pi r{/tex}{tex} = 2 \\times \\frac{{22}}{7} \\times 9.8{/tex}= 61.6 cm | |