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A solid cone with a vertical height of 6cm and base radius 3cm is melted and recast into 8 identical hemispheres. Find the total surface...

      

A solid cone with a vertical height of 6cm and base radius 3cm is melted and recast into 8 identical hemispheres. Find the total surface area of such 7 hemispheres.
(Take π= 22/7)

  

Answers


Seline
1/3 x p x 3² x 6= 8,2/3 x p x r³

r²=18x3/8x2 = 54/16 =27/8

r=3/2 or 1.5

T.S.A.p² + 2pr²=3pr²

7 x 3 x 22/7 x 1.5²
=148.5cm²
Belan answered the question on February 25, 2019 at 10:07


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