find the cost of paining 10 cylimdrical pillars of a building at ₹3.50 per sq. m if the diameter and height of each pillar is 24cm and 7m respectively
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the cost of painting the pillars os 184.8 rupees
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Step-by-step explanation:
Diameter = 24m
Radius = 24/2= 12m
Height = 7m
Painting will be done on the area of the pillar excluding the area of the bases.
Therefore we will find the curved surface area of the pillar .
Curved surface area = 2πrh
= 2 × 22/7 × 12 × 7
= 528 m ^2
Curved surface area of 10 pillars = 528 × 10 = 5280 m ^2
Cost of painting of 1 pillar = 3.50 Rs.
Cost of painting g 10 such pillars =
3.50 × 10
35.5 Rs.
Hope this helps you .
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