1) The figure shows a prism consisting for identical cuboids, The base of each cuboid is a square of side x cm. The base area of the prism is 64cm².
http://i.imgur.com/p92xzHz.jpg
a) Find the value of x.
b) Find the total surface area of the prism.
2) In the figure, the sector COD is cut away from the sector AOB. The area of the shaded region ABCD is 6π cm². ∠AOB = 108°, OC = 4cm and BC = 2cm
http://i.imgur.com/v4WlcjG.jpg
Find the perimeter of the shaded region ABCD.
* The length of CD = 12π/5 cm and the length of AB = 18π/5 cm
3) In the figure, a semi-circular paper with centre O of radius 10cm is folded to form a right circular cone by joining OA and OB together.
Find the capacity of the cone.
* The base radius of the cone is 5cm