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Question
EXERCISE 19.1
OL
[NCERT)
[NCERT)
LEVEL 1
1. Curved surface area of a right circular cylinder is 4.4 m2. If the radius of the base
the cylinder is 0.7 m, find its height.
2. 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.
3. 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.
4. It is required to make a closed cylindrical tank of height 1 m and base diameter 140
cm from a metal sheet. How many square metres of the sheet are required for the
same?
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