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The volume of a hemisphere is $$2425\frac{1}{2}$$ cm3, Find the radius. $$\left( {{\text{Take }}\pi = \frac{{22}}{7}} \right)$$
Answer & Solution
Correct Answer:
Option
C
$$\eqalign{
& \frac{2}{3}\pi {r^3} = 2425\frac{1}{2} \cr
& \frac{2}{3} \times \frac{{22}}{7} \times {r^3} = \frac{{4851}}{2} \cr
& {r^3} = \frac{{3 \times 7 \times 441}}{8} \cr
& r = \frac{{21}}{2} \cr
& r = 10.5{\text{ cm}} \cr} $$
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