Question

4. 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 m square
5. 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 12.50 per m2.
6. 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.
7. The inner diameter of a circular well is 3.5 m. It is 10 m deep. Find
() its inner curved surface area,
(ii) the cost of plastering this curved surface at the rate of * 40 per m²
8. In a hot water heating system, there is a cylindrical pipe of length 28 m and diameter
5 cm. Find the total radiating surface in the system.​

Answer 1

Answer:

4☝ answer and 7

Step-by-step explanation:

5 AnswerA 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 र 12.50 per m2. = र 5.5 x 12.50 = र 68.75

6 answerHight 0.3

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Answer 2

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