Advertisements
Advertisements
प्रश्न
The dome of a building is in the form of a hemisphere. Its radius is 63 dm. Find the cost of
painting it at the rate of Rs. 2 per sq. m.
उत्तर
Dome Radius - 63d m - 6.3m
Inner S.A of dome - `2πr^2 - 2 × 22/7 × (6.3)^2 - 249.48 m^2`
Now . cost of `1m^2` = Rs. 2.
∴ Cost of `249.48m^2`- Rs [2 × 249.48]
- Rs.498.96.
APPEARS IN
संबंधित प्रश्न
Find the surface area of a sphere of radius 10.5 cm .
Find the surface area of a sphere of radius 5.6 cm .
The surface area of a sphere is 5544 `cm^2`, find its diameter.
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.
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?
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 sphere and a cube are of the same height. The ratio of their volumes is
How many lead balls of radii 1 cm each can be made from a sphere of 8 cm radius?
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 total surface area of a hemisphere is how many times the square of its radius
