The square water tank has its sides equal to $20 m$ . There are four semi-circular grassy plots all round it. Find the area of semi-circular plots.

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Solution

Let $A B C D$ is the square plot of side $= 20 m$
Here $4$ semicircles combine to form a two circle of diameter $20 m .$
The area of the four semicircular plots $=$ area of two circles with radius $10 m$
Hence area of the four semicircular plots $= 2 π r^{2}$
$= 2 \times 3.14 \times 10^{2}$
$= 628 m^{2}$

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The square water tank has its sides equal to 20m. There are four semi-circular grassy plots all round it. Find the area of semi-circular plots.

Let ABCD is the square plot of side =20mHere 4 semicircles combine to form a two circle of diameter 20m.The area of the four semicircular plots = area of two circles with radius 10mHence area of the four semicircular plots =2πr2=2×3.14×102=628m2

The square water tank has its sides equal to $20 m$ . There are four semi-circular grassy plots all round it. Find the area of semi-circular plots.