Question

area of circle of diameter 8.4 metre​

Answer 1

Answer:

given:-

d=8.4m. ( r=d/2, r=8.4/2=4.2m)

Area of circle =πr²

area of circle= 22/7×(4.2)²

=22/7×17.64

Area of circle=55.44 m².

Answer 2

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• Diameter of the circle = 8.4 m

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• The area of the circle = ?

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• Diameter = 8.4 m

$\footnotesize\bold{\underline{\underline{\sf{\red{Therefore:-}}}}}$

$\sf \: Radius = \dfrac{Diameter}{2} \\ \\ \sf \: Radius = \dfrac{ \cancel{8.4} \: m}{ \cancel2} \\ \\ \sf \: Radius = \large{\boxed{\bf\pink{4.2 \: m}}}$

$\footnotesize\bold{\underline{\underline{\sf{\red{Therefore:-}}}}}$

$\sf \: Area \: of \: circle = \pi \: r {}^{2} \\ \\ \sf \: Area \: of \: circle = \dfrac{22}{7} \times (4.2) {}^{2} \\ \\ \sf \: Area \: of \: circle = \dfrac{22}{ \cancel7} \times \cancel{4.2}\times 4.2 \\ \\ \sf \: Area \: of \: circle =22 \times 0.6 \times 4.2 \\ \\ \sf \: Area \: of \: circle =13.2 \times 4.2 \\ \\ \sf \: Area \: of \: circle =\large{\boxed{\bf\orange{55.44 \: m {}^{2} }}}$

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• The area of the circle is 55.44 m².