The diagram shows a sector of a circle with centre , radius 8 cm and sector angle 165°.
The surface area of a sphere is the same as the area of the sector.
Calculate the radius of the sphere.
[The surface area, , of a sphere with radius is ]
............................................ cm
A cone is made from the sector by joining to .
........................................... cm [2]
[The volume, , of a cone with radius and height is ]
.......................................... cm3 [4]
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