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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?
5Q:
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?
- 1$$ {3168\ cm^{2}}$$true
- 2$$ {3186\ cm^{2}}$$false
- 3$$ {3200\ cm^{2}}$$false
- 4$$ {3150\ cm^{2}}$$false
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