Question

a metallic pipe whose internal and external diameters are 8 cm and 6 cm , has a length of 2.1 m. find the volume of the metal.​

Answer 1

Answer:

4620 cm^3

Step-by-step explanation:

see answer in the picture

Answer 2

Answer:

Internal diameter of pipe=6cm

internal radius =6cm/2 =3cm

External diameter =8cm

external radius =8cm/2 = 4cm

Step-by-step explanation:

volume metallic pipe =

External volume of pipe- Internal volume of pipe

volume of metal pipe = πR^2h - πr^2h

=πh(R^2-r^2)

=22/7*2•1(4^2-3^2)

=22/7*21/10(16-9)

=22/7*21/10*7

=464/10

=46•4 cm^3