Mathematics, 04.02.2021 15:40 rfdgd

The diagram shows a sector OACB of a circle with centre O. The point C is the midpoint of the arc AB.
The diagram also shows a hollow cone with vertex O.
The cone is formed by joining OA and OB.
a
Volume of cone = zarn
Curved Surface Area of cone = rf
The cone has volume 62.6 cm and height 3.8 cm.
Calculate the size of angle AOB of sector OACB.
Give your answer correct to 3 significant figures.
You must show all your working.

The diagram shows a sector OACB of a circle with centre O.

The point C is the midpoint of the arc

Answers: 2

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The diagram shows a sector OACB of a circle with centre O. The point C is the midpoint of the arc A...