Advertisements
Advertisements
प्रश्न
Find the volume of the hollow sphere whose inner diameter is 8 cm and the thickness of the material of which it is made is 1 cm .
Advertisements
उत्तर
Inner diameter = 8 cm
Inner radius = r = 4 cm
Outer radius = R = 4cm + 1cm thick material = 5 cm
Volume of hemisphere = `2/3pir^3`
Required Volume = `4/3pi(R^3 - r^3)`
= `4/3 xx 22/7 xx (5^3 - 4^3)`
= `4/3 xx 22/7 xx 61`
= 255.6 cm3
Required volume= 255.6 cm3
संबंधित प्रश्न
Find the surface area of a sphere of radius 5.6 cm.
The dome of a building is in the form of a hemisphere. Its radius is 63 dm. Find the cost of painting it at the rate of Rs. 2 per sq. m.
The diameter of the moon is approximately one fourth of the diameter of the earth. Find the
ratio of their surface areas.
The volume of a sphere is 38808 cm3; find its diameter and the surface area.
A spherical ball of lead has been melted and made into identical smaller balls with radius equal to half the radius of the original one. How many such balls can be made?
If the number of square centimeters on the surface of a sphere is equal to the number of cubic centimeters in its volume, what is the diameter of the sphere?
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 radius of the solid sphere.
- the number of cones recast. [Take π = 3.14]
The largest sphere is cut off from a cube of side 6 cm. The volume of the sphere will be
Find the volume of a sphere, if its surface area is 154 sq.cm.
A certain number of metallic cones, each of radius 2 cm and height 3 cm are melted and recast into a solid sphere of radius 6 cm. Find the number of cones used.
