Question

The base radius of a cone is 12 cm  and its perpendicular height is 16 cm.  

 Find  its 

i) slant height

ii) curved surface area

iii) Total surface area

iv) Volume​

Answer 1

Step-by-step explanation:

1. slant height=√h^2+r^2

=√16^2+12^2

=√256+144

=√400

=20cm

2. curved surface area= πrl

=22/7*12*20

=754.28cm^2

3. total surface area= πr(l+r)

=πr(20+12)

=22/7*12*32

=1206.85cm^2

4. volume of cone =1/3πr^2h

=1/3*22/7*12*12*16

=2413.71cm^2