Question 70
The radius of a sphere and hemisphere are same. The ratio of their total surface area is
Solution
Let the radius of sphere and hemisphere be $$r$$ cm
Thus, ratio of their total surface area is
= $$\frac{4\pi r^2}{3\pi r^2}$$
= $$\frac{4}{3}$$
$$\therefore$$ The ratio of their total surface area = 4 : 3
=> Ans - (D)
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