Question 44
Mensuration of SolidsIf a metal pipe 10cm long has an external diameter of 12cm and a thickness of 1cm, find the volume of the metal used in making the pipe.
- A.120πcm3
- B.110πcm3
- C.60πcm3
- D.50πcm3
Show the answer and explanation
Answer: B (110πcm3)
Explanation
Outer radius 6cm, inner radius 5cm. Volume = π(6² − 5²) × 10 = 110π cm³.