Question

metallic cylindrical pipe has thickness 0.25 cm and outside radius 3.25. If 1 cm3 of the metal has a mass 12g, find the mass of the 70cm long pipe.

Answer 1

Therefore the mass of the pipe =4125 gram

Step-by-step explanation:

Given metallic cylindrical pipe has thickness 0.25 cm and outside radius(R) 3.25 cm and height(h)=70 cm

The inside radius(r) = (3.25-.25)cm =3 cm

The volume of metallic cylinder =$\pi R^2 h -\pi r^2 h$

                                                     $=\pi \times 70(3.25^2-3^2) cm^3$

                                                     =343.75$cm^3$

Given that 1$cm^3$= 12 g

Therefore the mass of the pipe =( 343.75× 12) g =4125 gram