51)In the adjacent figure, x =
52)The length of the minute hand of a clock is 21 cm. The area swept by the minute hand in 20 minutes is
53)A secant intersects the circle at _______________ point(s)
54)How many tangents can be drawn to a circle from a point outside the circle?
55)If a sphere, a cylinder and a cone have the same radius and same height, then the ratio of their curved surface areas is
56)The volume of the cone =
57)If the diagonal of a cube is 4√3, then the side of the cube is
58)If the volume of a hemisphere is 19404 cm3 then its radius is
59)If x = cosθ + sinθ and y = cosθ – sinθ, then x2 + y2 =
60)sin (A + B) cos (A – B) + sin (A – B) cos (A + B) =
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