The area of a circular plot is $3850$ square metres. What is the circumference of the plot?

330 m

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220 m

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110 m

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300 m

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Solution

The correct option is A $220 m$
Area of circular plot $= 3850 m^{2}$
$\Rightarrow π r^{2} = 3850 \Rightarrow r^{2} = \frac{3850 \times 7}{22} = 1225$
$\Rightarrow r = \sqrt{1225} = 35 m$
$\Rightarrow 2 π r = 2 \times \frac{22}{7} \times 35 = 220 m$
$∴$ Circumference of plot $= 220 m$

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The area of a circular plot is 3850 square metres. What is the circumference of the plot?

The correct option is A 220mArea of circular plot=3850m2⇒πr2=3850⇒r2=3850×722=1225⇒r=√1225=35m⇒2πr=2×227×35=220m∴Circumference of plot=220m

The area of a circular plot is $3850$ square metres. What is the circumference of the plot?

The correct option is A $220 m$
Area of circular plot $= 3850 m^{2}$
$\Rightarrow π r^{2} = 3850 \Rightarrow r^{2} = \frac{3850 \times 7}{22} = 1225$
$\Rightarrow r = \sqrt{1225} = 35 m$
$\Rightarrow 2 π r = 2 \times \frac{22}{7} \times 35 = 220 m$
$∴$ Circumference of plot $= 220 m$