Solve the followings Questions. 1. A copper wire, 3 mm in diameter is wound about a cylinder whose length is 12 cm and diameter 10 cm, so as to cover the curved surface of the cylinder. Find the length and…
Solve the followings Questions. Unless stated otherwise, use π =22/7 1. A drinking glass is in the shape of a frustum of a cone of height 14 cm. The diameters of its two circular ends are 4 cm and 2…
Solve the followings Questions. Unless stated otherwise, use π =22/7 1. A metallic sphere of radius 4.2 cm is melted and recast into the shape of a cylinder of radius 6 cm. Find the height of the cylinder. Answer: It…
Solve the followings Questions. Unless stated otherwise, use π =22/7 1. A solid is in the shape of a cone standing on a hemisphere with both their radii being equal to 1 cm and the height of the cone is…
Solve the followings Questions. Unless stated otherwise, use π =22/7 1. 2 cubes each of volume 64 cm3 are joined end to end. Find the surface area of the resulting cuboid. Answer: Let l be length of each cubeVolume of each…
Solve the followings Questions. Unless stated otherwise, use π =22/7 1. Find the area of the shaded region in figure, if PQ = 24 cm, PR = 7 cm and O is the centre of the circle. Answer: PQ =…
Solve the followings Questions. Unless stated otherwise, use π =22 1. Find the area of a sector of a circle with radius 6 cm if angle of the sector is 60°.Answer: Area of the sector making angle θ= (θ/360°)×π r2Area…
Solve the followings Questions. Unless stated otherwise, use π =22 1. The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of…
Solve the followings Questions. In Q 1 to 3, choose the correct option and give justification. 1. From a point Q, the length of the tangent to a circle is 24 cm and the distance of Q from the centre…
Solve the followings Questions. 1. How many tangents can a circle have? Answer: A circle can have infinitely many tangents since there are infinitely many points on the circumference of the circle and at each point of it, it has…