Find the cost of painting 15 cylindrival pillars of a building at RS 2.50 per square metre if the diameter and height of each pillar are 48 cm and 7 metres respectively
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Given,
Diameter of each pillar= 48/100 m
Height of each pillar= 7m
Therefore
Curved surface area of each pillar=2.pi.R(R+H)=10.9m^2
There are 15 such pillars
Therefore area of 15 such pillars= 15×10.9=163.8m^2
Cost of painting 1m^2= 2.50 rs
Cost of paonting 163.8 m^2=409.25 rs
Diameter of each pillar= 48/100 m
Height of each pillar= 7m
Therefore
Curved surface area of each pillar=2.pi.R(R+H)=10.9m^2
There are 15 such pillars
Therefore area of 15 such pillars= 15×10.9=163.8m^2
Cost of painting 1m^2= 2.50 rs
Cost of paonting 163.8 m^2=409.25 rs
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