Question

The volume of a cylinder is half of its total surface area (in numbers). If the radius of its base is
7 cm, find the volume.​

Answer 1

Answer:

179.66cm^3

Step-by-step explanation:

volume of a cylindrical= πr^2h

total s.a=2πr(r+h)

2(πr^2h)=2πr(r+h)

rh=r+h

r=7cm

7h=7+h

6h=7

h=7/6

volume of a cylinder= 22/7×7×7×7/6

=179.66cm^3

Answer 2

Answer:

616 cm^3

Step-by-step explanation:

volume of a cylinder = πr^2h

surface area of a cylinder=2πrh+2πr^2

2(2πrh+2πr^2)=πr^2h

volume=π X 7 X 7 X h

154h=2(2π7h+2π7^2)

154h= 308h+616

h=4

V=154 X 4

616 CM^3