Advertisements
Advertisements
प्रश्न
The ratio of the total surface area to the lateral surface area of a cylinder with base radius 80 cm and height 20 cm is
पर्याय
2 : 1
3 : 1
4 : 1
5 : 1
उत्तर
5 : 1
Ratio of the total surface area to the lateral surface area `= "Total surface area"/"Latest surface area"`
`= (2pi("h"+"r"))/(2pi"rh")`
`= ("h" + "r")/"h"`
`= (20+80)/20`
`=100/20`
`= 5/1`
= 5 : 1
Hence, the required ratio is 5 : 1
APPEARS IN
संबंधित प्रश्न
Find the volume of a cone if the radius of its base is 1.5 cm and its perpendicular height is 5 cm.
The capacity of a certain cuboidal tank is 50000 litres of water. Find the breadth of the tank, if its height and length are 10 m and 2.5 m respectively.
Water flows at the rate of 10 m / minute through a cylindrical pipe 5 mm in diameter . How long would it take to fill a conical vessel whose diameter at the base is 40 cm and depth 24 cm.
A hemispherical tank full of water is emptied by a pipe at the rate of \[\frac{25}{7}\] litres per second. How much time will it take to half-empty the tank, If the tank is 3 metres in diameter?
A right angled triangle with sides 3 cm and 4 cm is revolved around its hypotenuse. Find the volume of the double cone thus generated.
If three metallic spheres of radii 6 cm, 8 cm and 10 cm are melted to form a single sphere, the diameter of the sphere is
A bucket open at the top is in the form of a frustum of a cone with a capacity of 12308.8 cm3 . the radii of the top and bottom of the circular ends of the bucket are 20 cm and 12 cm respectively. Find the height of the bucket and also the area of the metal sheet used in making it.
A cylinder, a cone and a hemisphere are of equal base and have the same height. What is the ratio of their volumes?
The radii of the top and bottom of a bucket of slant height 45cm are 28cm and 7 cm respectively. The curved surface area of the bucket is ______.
A cylindrical pencil sharpened at one edge is the combination of ______.
