10 cylindrical pillars of a building have to be painted. The diameter of each

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10 cylindrical pillars of a building have to be painted. The diameter of each pillar is 50 cm and the height is 4 m. The cost of painting at the rate of 50 paise per square metre is

Options:

A . Rs 31.40

B . Rs 314

C . Rs 331.40

D . Rs 331

Answer: Option A

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