Question

a paper cone has a base diameter of 8cm a height of 3cm.
a)caculate the volume of the cone in terms of pie
b)if the cone is cut and opened out into the sector of a circle.what is the angle of the sector

Answer 1

a) v = ⅓ π r² h = 16 π

b) the radius of the circle is 5 cm
... √[(8/2)² + 3²] = 5

Θ = 2 π * 8 / 10

Answer 2

9 in height
6in