# Solution - Surface Area of a Right Circular Cylinder

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ConceptSurface Area of a Right Circular Cylinder

#### Question

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]

#### Solution

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In the given figure, you see the frame of a lampshade. It is to be covered with a decorative cloth. The frame has a base diameter of 20 cm and height of 30 cm. A margin of 2.5 cm is to be given for folding it over the top and bottom of the frame. Find how much cloth is required for covering the lampshade.

["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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Find

(i) The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high.

(ii) How much steel was actually used, if 1/12 of the steel actually used was wasted in making the tank.

["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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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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#### BooksVIEW ALL [1]

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