Advertisements
Advertisements
Question
Find the surface area of a sphere of radius 14 cm.
Solution
In the given problem, we have to find the surface area of a sphere of a given radii.
Radius of the sphere (r) = 14 cm
So, surface area of the sphere = `4pi r^2`
`=4(22/7)(14)^2`
= 2464 cm2
Therefore, the surface area of the given sphere of radius 14 cm is 2464 cm2.
APPEARS IN
RELATED QUESTIONS
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 radius of the sphere.
- the number of cones recast. (Take π = `22/7`)
A solid sphere of radius 15 cm is melted and recast into solid right circular cones of radius 2.5 cm and height 8 cm. Calculate the number of cones recast.
A cylinder of same height and radius is placed on the top of a hemisphere. Find the curved
surface area of the shape if the length of the shape be 7 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`.
The total surface area of a hemisphere of radius r is
Find the surface area and volume of sphere of the following radius. (π = 3.14)
4 cm
Find the surface area of a sphere, if its volume is 38808 cubic cm. `(π = 22/7)`
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 .
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 weight of the material drilled out if it weighs 7 gm per cm3.
There is a ratio 1: 4 between the surface area of two spheres, find the ratio between their radius.
