Q: An iron pipe 20 cm long has exterior diameter 25 cm. If the thickne – McqOptions

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1.	Q: An iron pipe 20 cm long has exterior diameter 25 cm. If the thickness of the pipe is 1 cm, then the whole surface area of the pipe?
A.	$$ {3168\ cm^{2}}$$
B.	$$ {3186\ cm^{2}}$$
C.	$$ {3200\ cm^{2}}$$
D.	$$ {3150\ cm^{2}}$$
Answer» B. $$ {3186\ cm^{2}}$$

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