Q9. A circle has a chord 25mm with an angle of (Pie)/6 subtended at the centre. Find the length of the arc cut off by the chord.
Q10. A Sector of a circle with radius 5cm and an angle of (Pie)/3 subtended at the centre is cut out of cardboard. It is then curved around to form a cone. Find its exact surface area and volume.
Q10. A Sector of a circle with radius 5cm and an angle of (Pie)/3 subtended at the centre is cut out of cardboard. It is then curved around to form a cone. Find its exact surface area and volume.