Question

the inner and outer walls of a 30 cm long pipe have a diameter of 15 cm and 17 cm, respectively. find the volume of the material used in pipe ​

Answer 1

Step-by-step explanation:

Formula for calculating volume of cylinder is πr^2h

Outer r - inner r

πh. Outer^2-innrrR^2

22/7×30×8.5^2-7.5^2

=22/7×30×16.03

=22×30×2.29

=1519.4

Answer 2

Answer:

It will be 1507.2cm cube to me

Step-by-step explanation:

=3.14 x 30 x [(15/2) + (17/2)]

=3.14 x 30 x 7.5 + 8.5

=3.14 x 30 x 16

=50.24 x 30

=1507.2m cube