In a building there are 25 cylindrical pillars. The radius of each pillar is 50 cm and height 5 m. Find the cost of painting curved surface area of pillars at the rate of₹70 per sq. m.
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Answer:
curved surface area of cylindrical pillar = 2πrh
=2×3.14×0.50×5
= 15.7 m²
area of 25 pillars= 15.7×25
=392.5 m²
so, cost white washing all the pillars @ of Rs 75
= 392.5×70
=Rs 27475
hope it's helpful for you.
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