Answers

2014-04-02T20:45:38+05:30
Total surface area of cone = πr²+πrs(s is the slant height and r is the radius)
=π3*3+π3*5
=9π+15π
=14π
=14*22/7 (where π = 22/7)
=2*22 = 44sq.cm

The cone is cut into 2 pieces
TSA of single piece = TSA of cone / 2
=44/2 = 22sq.cm
2 3 2
2014-04-03T06:55:03+05:30
Total surface area of cone=22/7r^2+22/7rl
                                         =22/7(3^2+3*5)
                                         =22/7(9+15)
                                         =22/7(24)
                                         =75.428sq.cm
It is divided into two pieces,then
Total surface area of one piece=TSA of the cone/2
                                                 =75.428/2
                                                 =37.714sq.cm
3 4 3