An iron pipe 20 cm long has exterior diameter equal to 25 cm. If the thickness o

Question

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 :

Options:

A . 3068 cm2

B . 3168 cm2

C . 3268 cm2

D . 3368 cm2

Answer: Option B

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