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In the newly constructed auditorium in t...

In the newly constructed auditorium in the school, there are 8 cylindrical shaped pillars of same size. Each pillar has a height of `4 cm`. Dlameter of the pillar is 1 meter.
i. Find the curved surface area of a pillar.
ii. Find the curved surface area of 8 pillars.
iii. If it cost 160 rupees to paint one square metre, how much will it cost?

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