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The internal and external diameters of a hollow hemispherical shell are 6cm and 10cm respectively.

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The internal and external diameters of a hollow hemispherical shell are 6cm and 10cm respectively. It is melted and recast into a solid cone of base diameter 14cm. Find the height of the cone so formed.

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Given:

Internal Diameter of a hollow hemispherical shell = 6cm

So, internal radius, (r) = 3cm

External Diameter of a hollow hemispherical shell = 10cm

So, external radius (R) = 5cm

Given that diameter of cone =14cm

So, radius = 7cm

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