A building has 8 cylindrical pillars of radius
0.5 m and height 6.3 m. If these pillars are to
be painted at the rate of 15 per m², what will
be the cost of painting all of them?
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Answered by
1
Given, diameter =1m, radius =
2
diameter
=
2
1
height of cylinder =4.2 m
Curved surface area of cylinder =2πrh=2π×
2
1
(4.2)=13.2m
2
∴8× right circular cylinder =8×13.2=105.6m
2
∴ cost of painting pillar at the rate of Rs. 24 per m
2
=24×105.6= Rs.2534.4
2
diameter
=
2
1
height of cylinder =4.2 m
Curved surface area of cylinder =2πrh=2π×
2
1
(4.2)=13.2m
2
∴8× right circular cylinder =8×13.2=105.6m
2
∴ cost of painting pillar at the rate of Rs. 24 per m
2
=24×105.6= Rs.2534.4
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0
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