Advertisements
Advertisements
प्रश्न
Volume of a cylinder with radius h and height r is ______.
उत्तर
Volume of a cylinder with radius h and height r is πh2r.
Explanation:
Given, radius of cylinder = h and height of cylinder = r.
Now, volume of a cylinder
= π × (Radius)2 × Height
= π × h2 × r
= πh2r
APPEARS IN
संबंधित प्रश्न
A lead pencil consists of a cylinder of wood with solid cylinder of graphite filled in the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm. If the length of the pencil is 14 cm, find the volume of the wood and that of the graphite.
`["Assume "pi=22/7]`
A circus tent is cylindrical to a height of 8 m surmounted by a conical part. If total height of the tent is 13 m and the diameter of its base is 24 m; calculate :
- total surface area of the tent,
- area of canvas, required to make this tent allowing 10% of the canvas used for folds and stitching.
A cylindrical boiler, 2 m high, is 3.5 m in diameter. It has a hemispherical lid. Find the volume of its interior, including the part covered by the lid.
How many cubic meters of earth must be dug out to make a well 28 m deep and 2.8 m in diameter? Also, find the cost of plastering its inner surface at Rs. 4.50 per sq.meter.
Two right circular solid cylinders have radii in the ratio 3 : 5 and heights in the ratio 2 : 3. Find the ratio between their curved surface areas.
Find the weight of a lead pipe 35 cm long. The external diameter of the pipe is 2.4 cm and the thickness of the pipe is 2mm, given 1 cm3 of lead weighs 10 gm.
The ratio of the volumes of a cylinder, a cone and a sphere, if each has the same diameter and same height is
The water for a factory is stored in a hemispherical tank whose internal diameter is 14 m. The tank contains 50 kilolitres of water. Water is pumped into the tank to fill to its capacity. Calculate the volume of water pumped into the tank.
Two cylinders of equal volume have heights in the ratio 1 : 9. The ratio of their radii is ______.
A hollow garden roller of 42 cm diameter and length 152 cm is made of cast iron 2 cm thick. Find the volume of iron used in the roller.