?A hollow cylindrical pipe is 21dm long . Its outer and inner diameters are 10cm and 6cm respectively . Find the volume of the copper used in making the pipe .
?A hollow cylindrical pipe is 21dm long . Its outer and inner diameters are 10cm and 6cm respectively . Find the volume of the copper used in making the pipe .
Answers (1)
Solution: We have ,
h = height of the cylindrical pipe = 21 dm = 210cm [ 1 dm = 10cm ]
R = External radius
r = Internal radius
Volume of the copper used in making the pipe
= Volume of the external cylinder - Volume of the internal cylinder