Diameter of cylinder = 21 cm Height of cylinder = 38 cm The diameter of cone = 7 cm The height of cone = 12 cm The diameter of Hemisphere = 7 cm Let 'R' be the radius of Cylinder, 'r' be the radius of Cone, 'H' be the height of Cylinder and 'h' be the height of Cone R = 21/2 cm, H = 38 cm, r = 7/2 and h = 12 cm Let number of cone be n, then According to the question 
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