Advertisements
Advertisements
प्रश्न
Find the surface area of a sphere of diameter 14 cm.
`["Assume "pi=22/7]`
Advertisements
उत्तर
Radius (r) of sphere = `"Diameter"/2`
= `(14/2) cm`
= 7 cm.
Surface area of sphere = 4πr2
= `[4xx22/7xx(7)^2]cm^2`
= (88 × 7) cm2
= 616 cm2
Therefore, the surface area of a sphere having diameter 14 cm is 616 cm2.
APPEARS IN
संबंधित प्रश्न
Find the surface area of a sphere of radius 5.6 cm.
`["Assume "pi=22/7]`
Find the surface area of a sphere of diameter 3.5 m.
`["Assume "pi=22/7]`
A solid cone of radius 5 cm and height 8 cm is melted and made into small spheres of radius 0.5 cm. Find the number of spheres formed.
The surface area of a sphere is 2464 cm2, find its volume.
A hollow sphere of internal and external diameter 4 cm and 8 cm respectively is melted into a cone of base diameter 8 cm. Find the height of the cone.
A hollow sphere of internal and external radii 6 cm and 8 cm respectively is melted and recast into small cones of base radius 2 cm and height 8 cm. Find the number of cones.
If a hollow sphere of internal and external diameters 4 cm and 8 cm respectively melted into a cone of base diameter 8 cm, then find the height of the cone.
Mark the correct alternative in each of the following:
In a sphere the number of faces is
The largest sphere is cut off from a cube of side 6 cm. The volume of the sphere will be
If the ratio of volumes of two spheres is 1 : 8, then the ratio of their surface areas is
A sphere is placed inside a right circular cylinder so as to touch the top, base and lateral surface of the cylinder. If the radius of the sphere is r, then the volume of the cylinder is
Find the surface area and volume of sphere of the following radius. (π = 3.14)
4 cm
If the surface area of a sphere is 2826 cm2 then find its volume. ( π= 3.14)
Find the radius of the sphere whose surface area is equal to its volume .
The total area of a solid metallic sphere is 1256 cm2. It is melted and recast into solid right circular cones of radius 2.5 cm and height 8 cm. Calculate: the number of cones recasted [π = 3.14]
The surface area of a solid metallic sphere is 2464 cm2. It is melted and recast into solid right circular cones of radius 3.5 cm and height 7 cm. Calculate : the number of cones recast. `("Take" pi =22/7)`
From a rectangular solid of metal 42 cm by 30 cm by 20 cm, a conical cavity of diameter 14 cm and depth 24 cm is drilled out. Find: the volume of remaining solid
The volume of a sphere is 905 1/7 cm3, find its diameter.
