Advertisements
Advertisements
प्रश्न
The volume of a sphere is 38808 cm3; find its diameter and the surface area.
Advertisements
उत्तर
Volume of the sphere = 38808 cm3
Let radius of sphere = r
∴ `4/3pir^3 = 38808 `
`=> 4/3 xx 22/7 xx r^3 = 38808`
`=> r^3 = (38808 xx 7 xx 3)/(4 xx 22) = 9261`
`=>` r = 21 cm
∴ Diameter = 2r
= 21 × 2 cm
= 42 cm
Surface area = 4πr2
= `4 xx 22/7 xx 21 xx 21`
= 5544 cm2
APPEARS IN
संबंधित प्रश्न
A model of a ship is made to a scale 1: 300
1) The length of the model of the ship is 2 m. Calculate the lengths of the ship.
2) The area of the deck ship is 180,000 m2. Calculate the area of the deck of the model.
3) The volume of the model in 6.5 m3. Calculate the volume of the ship.
The surface area of a sphere is 5544 `cm^2`, find its diameter.
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 ratio between the volume of a sphere and volume of a circumscribing right circular cylinder is
Find the surface area and volume of sphere of the following radius. (π = 3.14)
4 cm
If the radius of a solid hemisphere is 5 cm, then find its curved surface area and total surface area. ( π = 3.14 )
The radius of a sphere is 9 cm. It is melted and drawn into a wire of diameter 2 mm. Find the length of the wire in metre.
Find the radius of a sphere whose surface area is equal to the area of the circle of diameter 2.8 cm
How many lead balls of radii 1 cm each can be made from a sphere of 8 cm radius?
