Advertisements
Advertisements
प्रश्न
The curved surface area of a right circular cone is 12320 cm2. If the radius of its base is 56 cm, then find its height.
उत्तर
CSA (cone) = `pirl` = 12320
`22/7 xx 56 xx l` = 12320
`l = 70 cm`
`h = sqrt(70^2 - 56^2)` = 42 cm
APPEARS IN
संबंधित प्रश्न
In a rectangular park of dimensions 50 m × 40 m, a rectangular pond is constructed so that the area of grass strip of uniform width surrounding the pond would be 1184 m2. Find the length and breadth of the pond ?
Find the ratio of the volumes of a cylinder and a cone having equal radius and equal height.
(A)1 : 2 (B) 2 : 1 (C) 1 : 3 (D) 3 : 1
In a cylindrical vessel of diameter 24 cm, filled up with sufficient quantity of water, a solid spherical ball of radius 6 cm is completely immersed. Find the increase in height of water level.
An iron pillar consists of a cylindrical portion 2.8 m high and 20 cm in diameter and a cone 42 cm high is surmounting it. Find the weight of the pillar, given that 1 cubic cm of iron weighs 7.5 gm.
The volume of the greatest sphere that can be cut off from a cylindrical log of wood of base radius 1 cm and height 5 cm is
A solid metallic spherical ball of diameter 6 cm is melted and recast into a cone with diameter of the base as 12 cm. The height of the cone is
The slant height of a conical mountain is 2.5 km and the area of its base is 1.54 km2. Find the height of the mountain.
A hemispherical bowl of internal radius 9 cm is full of water. Its contents are emptied into a cylindrical vessel of internal radius 6 cm. Find the height of water in the cylindrical vessel.
Find the surface area of a sphere of radius 3.5 cm.
Ratio of area of a circle to the area of a square whose side equals radius of circle is 1 : π.
