Advertisements
Advertisements
प्रश्न
How many lead balls of radii 1 cm each can be made from a sphere of 8 cm radius?
Advertisements
उत्तर
Volume of sphere = `4/3pir^3`
Volume of sphere = `4/3pi8^3`
= `4/3pi512`
= `682.6667pi`
Volume of lead ball = `4/3pi1^3`
= `1.333333pi`
No. of lead balls that can be made = `(682.6667pi)/(1.333333pi) = 512`
No. of lead balls that can be made = 512
संबंधित प्रश्न
Find the surface area of a sphere of diameter 14 cm.
`["Assume "pi=22/7]`
Find the surface area of a sphere of diameter 3.5 m.
`["Assume "pi=22/7]`
Find the surface area of a sphere of radius 10.5 cm.
A wooden toy is in the form of a cone surmounted on a hemisphere. The diameter of the base
of the cone is 16 cm and its height is 15 cm. Find the cost of painting the toy at Rs. 7 per 100
`cm^2`.
If a solid sphere of radius r is melted and cast into the shape of a solid cone of height r, then the radius of the base of the cone is
The ratio between the volume of a sphere and volume of a circumscribing right circular cylinder is
The internal and external diameters of a hollow hemi-spherical vessel are 21 cm and 28 cm respectively. Find volume of material of the vessel.
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
A sphere cut out from a side of 7 cm cubes. Find the volume of this sphere?
The radius of a sphere increases by 25%. Find the percentage increase in its surface area
