From Class IX, you are familiar with some of the solids like cuboid, cone, cylinder, and sphere. You have also learnt how to find their surface areas and volumes.
The area occupied by a object from outside is known as surface area. Whereas the space occupied by a object from inside is known as volume.
Shaalaa.com | Surface Area and Volume part 1 (Basic)
The diameter and length of a roller is 120 cm and 84 cm respectively. To level the ground, 200 rotations of the roller are required. Find the expenditure to level the ground at the rate of Rs. 10 per sq.m.
Find the ratio of the volumes of a cylinder and a cone having equal radius and equal height.
(A)1 : 2 (B) 2 : 1 (C) 1 : 3 (D) 3 : 1
A tank of cylindrical shape has radius 2.8 m and its height 3.5 m. Complete the activity to find how many litres of water the tank will contain.
Capacity of water tank = Volume of cylindrical tank
How many solid cylinders of radius 6 cm and height 12 cm can be made by melting a solid sphere of radius 18 cm?
Activity: Radius of the sphere, r = 18 cm
For cylinder, radius R = 6 cm, height H = 12 cm
∴ Number of cylinders can be made =`"Volume of the sphere"/(--)`
`= (4/3 pi"r"^3)/--`
`= (4/3 xx 18 xx 18 xx 18)/---`