A solid cone of radius 5cm and height 8cm is melted and recast into small sphere of radius 0.5cm. Find the number of spheres formed.
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Answer:
volume of cone = 1/3 × 22/ 7 × r^2 h
volume of sphere =4/3 ×22/7 ×r^3
no of spheres = volume of cone ÷volume of sphere
therefore
(1/3×22/7×5×5×8)÷(4/3×0.5×0.5×0.5)
=400
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