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A solid metallic sphere of radius 5.6 cm is melted and solid cones each of radius 2.8 cm and height 3.2 cm are made. Find the number of such cones are…
-CBSE
Class
-Grade 10
-Quadratic equation

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answer is C.

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Detailed Solution

Let n be the number of cone Let r1= radius of spheres r2= radius of cone
Volume of sphere = n*volume of cone 4/3 𝝿r31, =nr22h
4r31 nr22h
n= 4r31/r22,h
= 4*(5.b)3/ (2.8)2*(3.2)
n=28
Hence , number of cubes are 28 .

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