Question

A hollow cylinder tube is 3.5vm long . If its inner and outer radii are 7 cm and 7.7 cm respectively , then find the volume of the material used in making the pipe.​

Answer 1

Answer:

volume of material used=113.19m³

Step-by-step explanation:

since the volume of material used must be equal to vol of outer cylinder- vol of inner cylinder

and vol of cylinder =πr²h

vol of material=π(7.7)²(3.5)-π(7)²(3.5

=22/7×3.5(7.7²-7²)

=113.19 m³