Total area of rectangular park = 120×100 = 12000 m2Area of park excluding circular lawn = 8700m2So,Area of circular lawn = 1200 – 8700 = 3300m2= πr2 = 3300r = 32.40 m

Q. 154.5( 11 Votes )

A park is in the

Class 10th RD Sharma - Mathematics 15. Areas Related to Circles

Answer :

Total area of rectangular park = 120×100 = 12000 m²

Area of park excluding circular lawn = 8700m²

So,

Area of circular lawn = 1200 – 8700 = 3300m²

= πr² = 3300

r = 32.40 m

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