Question

if we join two hemisphere of some radius along their bases then we get is
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Answer 1

Answer:

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if we join two hemisphere of some radius along their bases then we get is

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As two solid hemispheres of same base radius r are joined together along their bases then the new solid formed will be a sphere with the same radius r.

Answer 2

Concept: A hemisphere is strictly half a sphere. In general, a sphere makes precisely 2 hemispheres. A hemisphere is a three dimensional shape made by cutting a sphere into equal halves. It is look like a half ball.

Given: Two hemisphere with same radius.

Find: What we make when we join two hemispheres.

Solution:

Let the radius of both the hemisphere is r.

Curved surface area of the 1st hemisphere= 2π$r^{2}$

Curved surface area of the 2nd hemisphere= 2π$r^{2}$

If we join both hemisphere the we found a sphere.

= 2π$r^{2}$ +2π$r^{2}$

= 4π$r^{2}$.

Final answer: We get a sphere whose curved surface area is 4π$r^{2}$.

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