in a building there are 25 cylindrical pillars.the radius of each pillar is 28cm and height is 4m.find the total cost of painting the pillars at the rate of rs 8 perm^2
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Given,
Radius of each pillar= 28 cm
Height of each pillar=4 m= 400 cm
So, as we all know
CSA of a cylinder= 2(22/7) rh
= 2 (22/7) (28) (400)
= 70400 sq cm = 7.04 m sq
CSA of one pillar =7.04= (24)
= 168.96 sq m
Since, cost of painting 1 sq m= Rs. 8
∴Cost of 168.96 sq m =Rs. 8 ( 168.96)
= Rs. 1315.68
THIS IS THE SOLUTION TO THIS QUESTION.
Radius of each pillar= 28 cm
Height of each pillar=4 m= 400 cm
So, as we all know
CSA of a cylinder= 2(22/7) rh
= 2 (22/7) (28) (400)
= 70400 sq cm = 7.04 m sq
CSA of one pillar =7.04= (24)
= 168.96 sq m
Since, cost of painting 1 sq m= Rs. 8
∴Cost of 168.96 sq m =Rs. 8 ( 168.96)
= Rs. 1315.68
THIS IS THE SOLUTION TO THIS QUESTION.
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