Question

A metallic solid cylinder having diameter 6 cm is melted and recasted in the form of a sphere of the same radius. Find the total surface area of the cylinder.

Answer 1

Answer:

42π

Step-by-step explanation:

cylinder is converted into sphere means shape has changed, surface area is changed. the thing which remains the same it's volume.

comparing both volumes

cylinder volume = sphere volume

$\pi {r}^{2} h \: = 4/3\pi {r}^{3}$

therefore, h = (4/3)r = (2/3)d

h = 4 cm

cylinder surface area

= 2πrh + πr^2 + πr^2

=24π + 9π + 9π

= 42π

correct me if I am wrong

Answer 2

Answer:

Step-by-step explanation: