The volume of a hemisphere is 19404 cm3. Find its diameter (in cm).
Let radius of hemisphere = $$r$$ cm
Volume of hemisphere = $$\frac{2}{3}\times\pi r^3$$
=> $$\frac{2}{3}\times\frac{22}{7}\times(r)^3=19404$$
=> $$(r)^3=19404\times\frac{21}{44}$$
=> $$(r)^3=441\times21$$
=> $$r=\sqrt[3]{21\times21\times21}=21$$ cm
$$\therefore$$ Diameter = $$2\times21=42$$ cm
=> Ans - (A)
Create a FREE account and get:
