The volume of metal in a hollow cylindrical pipe is 572 cm^3. Its leng – McqOptions

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1.	The volume of metal in a hollow cylindrical pipe is 572 cm^3. Its length is 14 cm and its external radius is 7 cm. The thickness of the pipe is
A.	1 cm
B.	2 cm
C.	7/2 cm
D.	7/4 cm
Answer» B. 2 cm

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