Q. 84.3( 330 Votes )

A horse is tied t

Answer :

From the figure, it can be observed that the horse can graze a sector of 90° in a circle of 5 m radius

(i) Area that can be grazed by horse = Area of sector 


= × r2


= × 3.14 × 5 × 5


= 19.625 m2


The area that can be grazed by the horse when the length of rope is 10 m long = ×  (10)2


= × 3.14 × 100


= 78.5 m2


(ii) Increase in grazing area = Area grazed by a horse now - Area grazed previously
(78.5 - 19.625)


= 58.875 m2

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