Chapter 12 : Area Related to Circles

- 2 units
- p units
- 4 units
- 7 units

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Each wheel of a car is of diameter 80 cm. How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66 km per hour?

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A horse is tied to a peg at one corner of a square shaped grass field of side 15 m by means of a 5 m long rope. Find

(i) the area of that part of the field in which the horse can graze.

(ii) The increase in the grazing area if the rope were 10 m long instead of 5 m. (Use π=3.14)

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(Use π=3.14 and √3=1.73)

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(i) The total length of the silver wire required.

(ii) The arc of each sector of the brooch

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(i) The length of the arc (ii) Area of the sector formed by the arc (iii) Area of the segment formed by the corresponding chord

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