An iron pipe 20 cm long has exterior diameter equal to 25 cm. If the t – McqOptions

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1.	An iron pipe 20 cm long has exterior diameter equal to 25 cm. If the thickness of the pipe is 1 cm, then the whole surface of the pipe is :
A.	068 cm2
B.	168 cm2
C.	268 cm2
D.	368 cm2
Answer» C. 268 cm2

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