Question

A metallic cylindrical pipe has outer
radius of 3 cm and an inner radius of
2 cm. If the length of the pipe is 70 cm,
then the volume of metal in the pipe, in
cm", is
(A) 350 T
(Β) 630 π
16) 280
π
(D) 910​

Answer 1

Answer:

A) 350π

Step-by-step explanation:

inner dimensions

r= 2 cm

h= 70 cm

inner volume= π r^2 h

= π 2^2×70

= 280π

outer dimension

R=3 cm

h= 70 cm

outer volume= π R^2 h

= π 3^2×70

= 630π

volume of metal = outer volume - inner volume

630π-280π

350π

answer A) 350π