Q:

A shuttlecock used of playing badminton has the shape of a frustum of a cone mounted on a semi sphere. The external diameters of the frustum are 5 cm and 2 cm, the height of the entire shuttlecock is 7 cm. The external surface is of the shuttlecock is:

• 1
  67.98 sq.cm
• 2
  74.26 sq.cm
• 3
  70 sq.cm
• 4
  72 sq.cm