radii of two solid hemispheres are in the ratio 3:5. find the ratio of their csa and tsa
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Answer:
C1 :C 2=9:25
Explanation:
The curved and total surface area of a hemisphere are 2*pi*r*r and 3*pi*r*r.
If the ratio of 2 hemispheres are 3:5, then their radii can be considered to be 3r and 5r respectively.
The ratio of curved surface area will be 2*pi*3*r*3*r : 2*pi*5*r*5*r which on simplification becomes 9:25. The ratio of total surface area also will be the same.
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