A cylindrical pillar of a temple is shown in the figure, which is conical at the top. Thereare 14 such pillars, in the temple. Find the cost of polishing their curved surface area at therate of ` 1.50 per m2.

Hint: Find the area of one pillar: C.S.A> of cone + C.S.A of cylinder

Find the area of such 14 pillars and then cost of polishing them @ Rs. 1.50 per sq. m

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