Advertisements
Advertisements
प्रश्न
The curved surface area of a cylinder is 1320 cm2 and its base had diameter 21 cm. Find the height and the volume of the cylinder.
उत्तर
Given data is as follows:
Curved Surface Area = 1320 cm2
Diameter=21cm
We have to find the height and volume of the cylinder.
First of all, we have been given the diameter so let us find out the radius.
`r = 21/2`cm
We know that,
Curved Surface Area = `2pirh`
Therefore,
`2pirh`=1320
`2 xx 22/7 xx 21/2 xx h = 1320`
h = 20 cm
Now that we know both r and h , we can easily find out the volume.
Volume = `pi r^2 h`
=`22/7 xx 21/2 xx 21/2 xx 20`
Volume = 6930 cm3
APPEARS IN
संबंधित प्रश्न
In a hot water heating system, there is a cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system.
`["Assume "pi=22/7]`
A cylindrical vessel, without lid, has to be tin-coated on its both sides. If the radius of the base is 70 cm and its height is 1.4 m, calculate the cost of tin-coating at the rate of Rs. 3.50
per 1000 cm2.
Find the volume of a right circular cylinder whose height is 15 cm and the radius of the base is 7 cm.
The curved surface area of a cylinder is 1320 cm2 and its base has diameter 21 cm. Find the volume of the cylinder.
A well with 14 m diameter is dug 8 m deep. The earth taken out of it has been evenly spread all around it to a width of 21 m to form an embankment. Find the height of the embankment.
A solid cylinder has a total surface area of 231 cm2. Its curved surface area is \[\frac{2}{3}\] of the total surface area. Find the volume of the cylinder.
The difference between inside and outside surfaces of a cylindrical tube 14 cm long is 88 sq. cm. If the volume of the tube is 176 cubic cm, find the inner and outer radii of the tube.
If r is the radius and h is height of the cylinder the volume will be
The height of a circular cylinder is 4.2cm. There times the sum of the areas of its two circular faces is twice the area of the curved surface. Find the volume of the cylinder correct to 1 decimal place.
If a rectangular sheet having dimensions 22 cm x 11 cm is rolled along its shorter side to form a cylinder. Then the curved surface area of the cylinder so formed is:
