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Plz provide me general questions which are important from exam point of view ---class 10

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1. A cone, a hemisphere and a cylinder stand on equal bases and have same height. Then find ratio of their volumes.

2. Prove that the intercept of a tangent between two parallel tangents to a circle subtends a right angle at the centre of the circle.

3. If a, b, c are the sides of a right triangle where c is the hypotenuse, and it contains a circle that touches all sides of the triangle, then prove that r = (a+b-c)/2.

4. A birthday conical cap is cut by a plane parallel to its base and upper part is used for a new cap for a toy, The CSA of the new cap is 1/9 the CSA of the whole cone. Find the ratio of the line segments into which the cones altitude is divided by the plane.

5. If PAB is a secant to a circle intersecting the circle to A and B and PT is a tangent. Prove that PA×PB = PT².

I think dis would help u even i am also 10 only

whn is ur xams ??

whn is ur xams ??