Volume of Sphere
Volume of A Sphere
Volume of A Sphere: The volume V of a sphere of radius r is given by
Illustration: Find the volume of a sphere of radius 7cm.
Solution: We know that the volume V of a sphere of radius r is given by
Illustration: A solid lead ball of radius 7 cm was melted and then drawn into a wire of diameter 0.2 cm. Find the length of the wire.
Solution: We have,
Radius of the lead ball = 7 cm
As the ball is spherical, Volume of the lead ball
So, Volume of the lead ball
Clearly, the wire is a cylinder of radius 0.1 cm.
Let the length of the wire be h cm. Then,
Volume of the wlre
Volume of the wlre
But, Volume of the wire = Volume of the lead ball
Hence, the length of the wire = 457.33 m
Illustration: A solid sphere of radius 1 cm is melted to stretch into a wire of length 100 cm. Find the radius of the wire.
Solution: We have,
Find the volume of the sphere of radius 0.7 cm. | |||
| Right Option : B | |||
| View Explanation | |||
Find the volume of sphere of radius 2.1 cm. | |||
| Right Option : A | |||
| View Explanation | |||
Find the volume of sphere of radius 2 cm | |||
| Right Option : D | |||
| View Explanation | |||
Students / Parents Reviews [10]
About Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
Aman Kumar Shrivastava
10thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
