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
APPEARS IN
संबंधित प्रश्न
Find the surface area of a sphere of radius 10.5 cm.
`["Assume "pi=22/7]`
Find the surface area of a sphere of radius 5.6 cm.
Metallic spheres of radii 6 cm, 8 cm and 10 cm respectively are melted and recasted into a single solid sphere. Taking π = 3.1, find the surface area of the solid sphere formed.
The model of a building is constructed with the scale factor 1 : 30.
(i) If the height of the model is 80 cm, find the actual height of the building in meters.
(ii) If the actual volume of a tank at the top of the building is 27m3, find the volume of the tank on the top of the model.
Find the surface area of a sphere, if its volume is 38808 cubic cm. `(π = 22/7)`
A solid metallic cylinder has a radius of 2 cm and is 45 cm tall. Find the number of metallic spheres of diameter 6 cm that can be made by recasting this cylinder .
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 .
The cylinder of radius 12 cm have filled the 20 cm with water. One piece of iron drop in the stands of water goes up 6.75 cm. Find the radius of sphere piece.
The radius of a sphere increases by 25%. Find the percentage increase in its surface area
The total surface area of a hemisphere is how many times the square of its radius
