Question

from a circle of radius 15 cm ,a sector angle cut out and its bounding radii are bent so as to form a cone find its volume

Answer 1

Answer:

Step-by-step explanation:

Circumference of arc cut =x/360*2πr.                                                        216/360×22/7×15 = 56.52.                                                                             Circumference of arc = circumference of base of the cone.                    56.52=2πr; r= 56.52÷2×22÷7 ; r=9 cm.                                                  h=√r²-r² = √15²-9²= √225-81 = √144= 12cm.                                           Volume of cone =πr²h.                                                                              22÷7×9²÷12÷3= 7128÷7= 1018.28