Advertisements
Advertisements
प्रश्न
The total surface area of a solid hemisphere of radius 7 cm is ______.
पर्याय
447π cm2
239 π cm2
174 π cm2
147 π cm2
98 π cm2
196 π cm2
`228 2/3 π "cm"^2`
Advertisements
उत्तर
The total surface area of a solid hemisphere of radius 7 cm is `underline(bb(147π "cm"^2)`.
Explanation:
r = 7 cm
Total surface area of hemisphere = 3πr2
= 3π × 72
= (3 × 49)π cm2
= 147π cm2
APPEARS IN
संबंधित प्रश्न
A hemispherical depression is cut out from one face of a cubical wooden block such that the diameter l of the hemisphere is equal to the edge of the cube. Determine the surface area of the remaining solid.
From a solid cylinder whose height is 2.4 cm and diameter 1.4 cm, a conical cavity of the same height and same diameter is hollowed out. Find the total surface area of the remaining solid to the nearest cm2
[use `pi = 22/7`]
A tent of height 77dm is in the form a right circular cylinder of diameter 36m and height 44dm surmounted by a right circular cone. Find the cost of canvas at Rs.3.50 per m2 ?
A toy is in the form of a cone surmounted on a hemisphere. The diameter of the base and the height of cone are 6cm and 4cm. determine surface area of toy?
If the radii of circular ends of a bucket 24cm high are 5cm and 15cm. find surface area of
bucket?
A cylindrical tub, whose diameter is 12 cm and height 15 cm is full of ice-cream. The whole ice-cream is to be divided into 10 children in equal ice-cream cones, with conical base surmounted by hemispherical top. If the height of conical portion is twice the diameter of base, find the diameter of conical part of ice-cream cone ?
A solid is composed of a cylinder with hemispherical ends. If the length of the whole solid is 108 cm and the diameter of the cylinder is 36 cm, find the cost of polishing the surface at the rate of 7 paise per cm2 .
A solid is in the form of a cylinder with hemispherical ends. Total height of the solid is 19 cm and the diameter of the cylinder is 7 cm. Find the volume and total surface area of the solid.
If the total surface area of a solid hemisphere is 462 cm2, then find its volume.
From a solid cylinder of height 2.8 cm and diameter 4.2 cm, a conical cavity of the same height and same diameter is hollowed out. Find the total surface area of the remaining solid.
