Question

from a circle of radius 12 centimetre a sector with angle 72 degree is cut out and its bounding radii are bent so as to form a cone find its volume​

Answer 1

radius of sector= slant height of the cone.

x/ 360 = r/l

72/ 360 =r/ 12

cross multiplying

72×12=360r

r=72×12 ÷360

= 12/5

= 2.4

1. then find its volume using this radius.