Advertisements
Advertisements
प्रश्न
Find the surface area of a sphere of diameter 14 cm.
`["Assume "pi=22/7]`
उत्तर
Radius (r) of sphere = `"Diameter"/2`
= `(14/2) cm`
= 7 cm.
Surface area of sphere = 4πr2
= `[4xx22/7xx(7)^2]cm^2`
= (88 × 7) cm2
= 616 cm2
Therefore, the surface area of a sphere having diameter 14 cm is 616 cm2.
APPEARS IN
संबंधित प्रश्न
Find the total surface area of a hemisphere and a solid hemisphere each of radius 10 cm.
(Use 𝜋 = 3.14)
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.
The surface area of a sphere is 2464 cm2, find its volume.
Total volume of three identical cones is the same as that of a bigger cone whose height is 9 cm and diameter 40 cm. Find the radius of the base of each smaller cone, if height of each is 108 cm.
Find the total surface area of a hemisphere of radius 10 cm.
Mark the correct alternative in each of the following:
In a sphere the number of faces is
A sphere has the same curved surface area as the curved surface area of a cone of height 36 cm and base radius 15 cm . Find the radius of the sphere .
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.
A conical tent is to accommodate 77 persons. Each person must have 16 m3 of air to breathe. Given the radius of the tent as 7 m, find the height of the tent and also its curved surface area.
The surface area of a solid metallic sphere is 616 cm2. It is melted and recast into smaller spheres of diameter 3.5 cm. How many such spheres can be obtained?
