Question 23

Find the curved surface area in $$cm^{2}$$ of a hemisphere of diameter 28 cm.

Solution

Radius of hemisphere, $$r=\frac{28}{2}=14$$ cm

Curved surface area = $$2\pi r^2$$

= $$2\times\frac{22}{7}\times (14)^2$$

= $$44\times2\times14=1232$$ $$cm^2$$

=> Ans - (D)


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