# Solution - Surface Area of a Right Circular Cylinder

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ConceptSurface Area of a Right Circular Cylinder

#### Question

A cylindrical pillar is 50 cm in diameter and 3.5 m in height. Find the cost of painting the curved surface of the pillar at the rate of Rs.12.50 per m2.

["Assume "pi=22/7]

#### Solution

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A metal pipe is 77 cm long. The inner diameter of a cross section is 4 cm, the outer diameter being 4.4 cm.(See the given figure)

(i) inner curved surface area,

(ii) outer curved surface area,

(iii) total surface area.

["Assume "pi=22/7]

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The inner diameter of a circular well is 3.5 m. It is 10 m deep. Find

(i) Its inner curved surface area,

(ii) The cost of plastering this curved surface at the rate of Rs 40 per m2.

["Assume "pi=22/7]

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The diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete revolutions to move once over to level a playground. Find the area of the playground in m2?

["Assume "pi=22/7]

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The curved surface area of a right circular cylinder of height 14 cm is 88 cm2. Find the diameter of the base of the cylinder.

Assume pi = 22/7

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Curved surface area of a right circular cylinder is 4.4 m2. If the radius of the base of the cylinder is 0.7 m, find its height.

["Assume "pi=22/7]

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#### BooksVIEW ALL [1]

Solution for concept: Surface Area of a Right Circular Cylinder. For the course 8th-10th CBSE
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