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A circular pond of diameter 40m …

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A circular pond of diameter 40m is surrounded by a grass path 5m wide. Find the area of this path.

Posted by Diwakar Kumar 7 years, 3 months ago

CBSE > Class 10 > Mathematics

3 answers

Rakesh Kumar Tiwari 7 years, 3 months ago

Sorry I thought that 40m is radius. R=20 and r= 25

1Thank You

Sonali Aggarwal 7 years, 3 months ago

Given :

diameter of the circular pond is 40m

therefore the radius =40/2=20m

the width of the grass path=5m

therefore the radius of the outer circle =25m

Area of the pond={tex}\frac{22}7\times20\times20{/tex}

=1256m²

Area of the outer circle={tex}\frac{22}7\times25\times25{/tex}

=1964.28m²

Area of the grass path =Area of the outer circle -Area of the pond

=1964.28-1256

=708.28m²

2Thank You

Rakesh Kumar Tiwari 7 years, 3 months ago

Area of Path=π(R²-r²), where R= 40+5=45 and r=40

1Thank You

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CBSE > Class 10 > Mathematics