The radii of a sphere and a right circular cylinder are 3 cm each, If their volumes are equals, then curved surface area of the cylinder is
Radius of the sphere ($$r_1$$) = 3 cm
Radius of the right circular cylinder ($$r_2$$) = 3 cm
Let the height of the right circular cylinder = h
Volume of sphere = Volume of right circular cylinder
$$=$$> Â $$\frac{4}{3}\pi\ \left(r_1\right)^3=\pi\ \left(r_2\right)^2h$$
$$=$$> Â $$\frac{4}{3}\pi\ \left(3\right)^3=\pi\ \left(3\right)^2h$$
$$=$$>Â h = 4 cm
Height of the right circular cylinder = 4 cm
$$\therefore\ $$The curved surface area of the cylinder =Â $$2\pi\ r_2h=2\times\frac{22}{7}\times3\times4=\frac{528}{7}=75\frac{3}{7}cm^2$$
Hence, the correct answer is Option A
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