Question

5.
It costs 2200 to paint the inner curved surface of a cylindrical vessel 10 m deep. If
the cost of painting is at the rate of 20 per m², find
(i) inner curved surface area of the vessel,
(ii) radius of the base,
(iii) capacity of the vessel.
6. The capacity of a closed cylindrical vessel of height 1 m is 15.4 litres. How many
square metres of metal sheet would be needed to make it?
7. A lead pencil consists of a cylinder of wood with a solid cylinder of graphite filled in
the interior. The diameter of the pencil is 7 mm and the diameter of the graphite is 1 mm.
If the length of the pencil is 14 cm, find the volume of the wood and that of the
graphite
3. A patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm. If the
bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare
daily to serve 250 patients ?​

Answer 1

Answer:

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