RD Sharma - Mathematics

Book: RD Sharma - Mathematics

Chapter: 20. Surface Area and Volume of a Right Circular Cone

Subject: Mathematics - Class 9th

Q. No. 11 of Exercise 20.2

Listen NCERT Audio Books - Kitabein Ab Bolengi

11

A right angled triangle of which the sides containing the right angle are 6.3 cm and 10 cm in length, is made to turn round on the longer side. Find the volume of the solid, thus generated. Also, find its curved surface.

We have,


r = 6.3 cm, h = 10 cm


l = cm= cm


= cm = 11.82 cm


Now, Volume = × ×(6.3)2×10 cm3


= 415.8 cm3


Curved surface area = ×6.3×11.82 cm2


= 234.03 cm2


Chapter Exercises

More Exercise Questions