Question

If the volume of a cylnder is 128π cm and its radius is 4cm, then find the curved surface area.​

Answer 1

Answer:

Step-by-step explanation:

volume = 128pi

radius = 4 cm

formula for volume = pi x r² x h

now, 128pi = pi x 4² x h

128 = 4 x 4 x h

h = 128 / 4 x 4

h = 8 cm

now, curved surface area = 2 x pi x r x h

csa = 2 x pi x 4 x 8

      = 64pi cm²