1. The figure given below represents a sector of a circle of radius r cm making an angle q . The area of the sector is A cm2 and the perimeter of the sector is 60 cm. Prove that: (i)theta =360/pie(30/r-1) (ii) A = 30r - r square 2. The radii of the bases of two right circular solid cones of same height 1 r and 2 r respectively. The cones are melted and recast into a solid sphere of radius R. Show that the height of each cone is given by h=4Rcube/r1cube+r2cube



Figure .... please attach it