Question

A hollow cylindrical tube is 3.5m long if it's inner and outer radii are 7cm and 7.7cm respectively then find the volume of the material used in making the pipe

Answer 1

Volume of material used in making the pipe = $\bold {48069\ cm^3}$

Step-by-step explanation:

Given,Height = 3.5 m = 350 cm

Outer radii = 7.7 cm

Inner radii = 7 cm

Inner volume of cylinder = πr²h

                                         = $\frac{22}{7}\times 7\times 7\times 350$

                                         =$17150\ cm^3$

Outer volume of cylinder = πr²h

                                          = $\frac{22}{7}\times 7.7\times 7.7\times 350$

                                          = $65219\ cm^3$

Volume of material used in making the pipe = Outer volume of cylinder - Inner volume of cylinder

                                                                          = 65219 - 17150  

                                                                          =$\bold {48069\ cm^3}$

Answer 2

Answer:

good question of you are good students