The radius of the base of a cylindrical column of a building is 25 cm and its height is 3.5 m. It costs Rs 15.50 per sq m to paint this column. What will it cost to paint 10 such columns?
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Step-by-step explanation:
- It will cost equal to the surface area of ten such cylindrical columns.
- Area of columns is in diagram
- cost on painting is in diagram
A= 2πrh
=2×22/7×.25×3.5
=55 m²
cost of painting = 55×15.50
=852.5 Rs
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