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In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?
- a)Rs.1251.68
- b)Rs.1351.68
- c)Rs.1451.68
- d)Rs.1151.68
Correct answer is option 'B'. Can you explain this answer?
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In a building, there are 24 cylindrical pillars. The radius of each pi...
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In a building, there are 24 cylindrical pillars. The radius of each pi...
Solution:
Given,
Radius(r) of each pillar = 28 cm
Height(h) of each pillar = 4 m
Total pillars = 24
Finding Curved Surface Area of one pillar:
The formula for the curved surface area of a cylinder = 2πrh
where r is the radius and h is the height of the cylinder.
Curved surface area of one pillar = 2 x (22/7) x 28 cm x 4 m
= 2 x (22/7) x 0.28 m x 4 m
= 8.8 m²
Finding the total cost of painting the curved surface area of all pillars:
Total curved surface area of all pillars = Curved surface area of one pillar x Total pillars
= 8.8 m² x 24
= 211.2 m²
Rate of painting = Rs. 8 per m²
Total cost of painting = Rate of painting x Total curved surface area
= Rs. 8/m² x 211.2 m²
= Rs. 1690.4
Therefore, the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m² is Rs. 1351.68 (approx).
Hence, option (b) is the correct answer.
Given,
Radius(r) of each pillar = 28 cm
Height(h) of each pillar = 4 m
Total pillars = 24
Finding Curved Surface Area of one pillar:
The formula for the curved surface area of a cylinder = 2πrh
where r is the radius and h is the height of the cylinder.
Curved surface area of one pillar = 2 x (22/7) x 28 cm x 4 m
= 2 x (22/7) x 0.28 m x 4 m
= 8.8 m²
Finding the total cost of painting the curved surface area of all pillars:
Total curved surface area of all pillars = Curved surface area of one pillar x Total pillars
= 8.8 m² x 24
= 211.2 m²
Rate of painting = Rs. 8 per m²
Total cost of painting = Rate of painting x Total curved surface area
= Rs. 8/m² x 211.2 m²
= Rs. 1690.4
Therefore, the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m² is Rs. 1351.68 (approx).
Hence, option (b) is the correct answer.
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In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer?
Question Description
In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer? for Teaching 2024 is part of Teaching preparation. The Question and answers have been prepared according to the Teaching exam syllabus. Information about In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Teaching 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer?.
In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer? for Teaching 2024 is part of Teaching preparation. The Question and answers have been prepared according to the Teaching exam syllabus. Information about In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Teaching 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a building, there are 24 cylindrical pillars. The radius of each pillar is 28 cm and height is 4 m. what is the total cost of painting the curved surface area of all pillars at the rate of Rs. 8 per m2?a)Rs.1251.68b)Rs.1351.68c)Rs.1451.68d)Rs.1151.68Correct answer is option 'B'. Can you explain this answer?.
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