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A right circular cone of radius x cm and...

A right circular cone of radius x cm and of height h cm is placed on a hemisphere . Then the total surface area of the newly constructed solid object will be ` pi r (sqrt(h^(2) + r^(2))+ 2r)` sq- cm

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If a hemisphere of radius r unit is placed on one end of a right circular cyllinder of radius r unit and height h unit and a right circular cone of radius r unit and height h unit on the other end of the cylinder , then the total surface area of the new solid object will be pir (2h+2r+sqrt(h^(2)+r^(2))) sq - unit

Write whether the following statements are true or false : (ii) The radius of base , height and slant height of a solid right circular cone are r unit h unit and l unit respectively . The base of the cone is joint along the base of solid right circular cylinder. If the radii of the bases and heights of the cylinder and of the cone be equal , then the total surface area of the joint solid object will be (pirl + 2pirh +2 pir^(2)) sq - unit

Knowledge Check

  • The diameter of the base of a right circular cone is 6 cm and height is 4 cm . Then the curved surface area of the cone is

    A
    `15pi` sq-cm
    B
    `30 pi` sq-cm
    C
    `40 ` sq-cm
    D
    `55` sq-cm

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