A building has 8 cylindrical pillars whose cross sectional diameter is 1 m and height is 4.2m .Find expenditure to paint these pillars at rate of rs24 per sq m
Answers
diameter of pillar = 1m
radius of pillars = 1/2m
height of pillar = 4.2cm
rate of paint in pillars = Rs24/m^2
To find = cost of painting
curved surface area of cylinder = 2*pie*r(r+h)
=2*22/7*1/2(1/2+4.2)
=2*22/7*1/2*4.7
=14.78m^2
cost of painting = 24*14.78
=Rs 354.72
Total cost = 2533.38 Rs.
Given:
A building has 8 cylindrical pillars.
Cross sectional diameter is 1 m.
Height is 4.2 m.
To paint these pillars at rate of rs24 per sq m.
Explanation:
Expenditure to paint these pillars.
Formula used:
Surface area cylinder = × (Diameter)× Height
Explanation:
A building has 8 cylindrical pillars.
Top and bottom side of the cylinder is attached to the roof so that it will not be painted.
Diameter of the cylinder = 1m
Height is 4.2 m.
Surface area cylinder = × (Diameter)× Height
Surface area cylinder = × 1× 4.2
= 13.19 sq. m.
There are 8 pillars are there
Surface area of 8 pillars = 8 × 13.19
= 105.55 sq. m.
To paint these pillars at rate of rs24 per sq m.
Total cost = 105.55 × 24 = 2533.38 Rs.
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