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A sector of 110, cut out from a circle, has an area of 44/7 sq. cm. Find the radius of the circle.
Correct Answer Is : 2 cm The number of points that can be drawn through three non-collinear points is: Correct Answer Is : Only One Two circles are said to be concentric, if: Correct Answer Is : They have the same center Give two concentric circles with center O. A line cut the circles at A, B, C, D, respectively if AB = 10 cm, then length CD is: Correct Answer Is : 7.5 cm A chord of a circle divides the circular region into two parts, the region which contains the center is known as: Correct Answer Is : Major segment Two concentric circles form a ring. The inner and outer circumferences of the ring are 264/7 m and 440/7 m respectively. Find the width of the ring. Correct Answer Is : 4 cm The inner circumference of a circular race track, 15m wide, is 880 m. Find the radius of the outer circle. Correct Answer Is : 155 m A wheel makes 1000 revolutions in covering a distance of 132 km. Find the radius of the wheel. Correct Answer Is : 21 m The area of a circular field is 13.86 hectares. Find the cost of fencing it at the rate of Rs. 4.40 per meter. Correct Answer Is : Rs.5808 If the radius of the circle is decreased by 50%, find the percentage decrease in its area. Correct Answer Is : 75%