A cylindrical pipe open at both ends is made up of 2 cm thick plastic. If the external diameter is 42cm and the length of tube is 140 cm, find the volume of the metal used in it.
Answers
Answered by
2
Answer:
Internal diameter =11.2cm
Internal radius =11.22
=5.6m
Length of the tube =21cm
Volume of the internal cylinder =πr2h
=22×5.6×5.6×217=22×5.6×5.6×217
=2069.76cm2
External radius =R=(5.6+0.4)
Volume of the external cylinder =πR2h
=22×6×6×217=22×6×6×217
=2376cm2
Volume of the metal = volume of external diameter - volume of internal diameter
=(2376−2069.7
=306.24cm3=306.2cm3
Answer : 306.2cm2
hope it helps
Explanation:
Similar questions