Question

If two solid hemisheres of same base radii r, are joined together along their bases, they curved surface area of this new solid is​

Answer 1

Answer:

Step-by-step explanation:

See when you join two solid hemispheres along their bases then you end up with a perfect sphere of radius r

And hence the area of the plane surface of hemisphere ends up combining and you just get left with curved surface area of sphere  = 4πr²